Valgus knee is an adaptive characteristic of bipedalism.
Sahelanthropus tchadensis is the earliest pre-australopithecine found outside the East African Rift Valley.
Nonhoning chewing is a derived trait of Sahelanthropus tchadensis.
In order to maintain the body weight well above ankle throughout bipedal movement, for instance, the valgus knee (angle at the knee) is a crucial adaption. But ultimately, the stress and shock absorption at an inclined knee take their toll, and runners frequently complain of joint pain.
The presence of a bicondylar angle, or valgus knee; a more inferiorly positioned foramen magnum; the presence of a reduced or nonopposable big toe; a higher arch on the foot; and a more posterior orientation of the anterior portion are major morphological characteristics diagnostic (i.e., informative) of bipedalism.
Sahelanthropus tchadensis is the earliest pre-australopithecine found outside the East African Rift Valley.
One of the earliest species in the human phylogeny is known as Sahelanthropus tchadensis. Between seven and six million years ago, this animal inhabited Africa. This species may have been able to live in a variety of settings, including as meadows and woodlands, thanks to upright walking.
Nonhoning chewing is a derived trait of Sahelanthropus tchadensis.
African hominins, also known as the earliest humans, split out from apes between 6 and 7 million years ago. Sahelanthropus tchadensis differs from humans in two key anatomical ways: Small canines, and standing upright on two legs as opposed to four.
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based on their work with insertions and deletions of nucleotides in viral dna, crick and brenner were able to determine that the genetic code is read in increments of nucleotides.
Crick and Brenner determined that the genetic code was read in increments of three nucleotides.
Why does the genetic code is called triplet?
The same codon cannot code for more than one amino acid and for twenty proteins that are present. If the codons are triplet there will be 64 codons which are used to code for 20 amino acids. Hence, the genetic code is a triplet.
The three major codons are:
UAGUAAUGAThese codons terminate the polypeptide chain. Hence, these are called stop codons.
What is a frameshift mutation?
It is a change in the DNA caused by the insertion or deletion of fragments in a DNA sequence. This affects the reading of the genetic code. If one of the nucleotides is deleted from the sequence, then the entire reading of the sequence is changed.
Hence, Francis crick and Sydney Brenner concluded the order of three nucleotides in DNA through insertion (addition of one or more nucleotides to the DNA) and deletion (removal of at least one nucleotide in a gene).
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1. Which of the following regarding puberty is FALSE? Select one: a. Early signs of puberty include breast budding in girls and growth of the testes in boys. The first sure sign of puberty is menarche (first period) in women and nocturnal emissions (wet dreams) in men. b. A trigger is the maturation of the adrenal gland leading to production of androgens, which begins sometime between 6 and 8 years of age. c. It results in an increase of androgens in the female body and a decrease of androgens in the male body. d. In girls, it requires the proper fat/protein ratio for menarche to occur. 2. Which of the following is FALSE regarding what occurs during the typical female HPGA? Select one: a. Progesterone levels are low until the formation of the corpus luteum. b. Low progesterone levels following ovulation can shorten the luteal phase. c. Elevated LH stimulates the uterine endometrium, preparing it for implantation. d. Peak estrogen levels triggers LH synthesis. 3. What would happen to a manâs testosterone and LH levels if you blocked the release of GnRH by his hypothalamus? Select one: a. His LH levels would decrease and his testosterone levels would increase. b. His LH and testosterone levels would increase. c. His LH and testosterone levels would decrease. d. His LH levels would increase and his testosterone levels would decrease.
The choice truly is B, C, and C
Androgen hormones are often referred to as “male hormones”. In general, this hormone regulates everything related to the male reproductive organs. However, androgen hormones are also produced in the female body, but the amount is not much in men.
The menstrual cycle begins with the release of menstrual blood (menstruation), which marks the first day of the follicular phase. When the follicular phase begins, estrogen and progesterone levels are low. The ovulatory phase begins with limiting luteinizing hormone and follicle-stimulating hormone levels. During the luteal phase, luteinizing hormone and follicle-stimulating hormone decrease. In this phase, the estrogen level is high. Progesterone and estrogen cause the uterine lining to thicken more, in anticipation of the possibility of conception.
In men, the function of the GnRH hormone is to stimulate the production of LH (Luteinizing Hormone) in the pituitary gland. LH is then carried by the bloodstream, binds to receptors on cells in the testicles, and then stimulates the formation of sperm cells.
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1.how the kidneys metabolize carbohydrates, lipids, and proteins and the effect that these three macromolecules have on renal function.
2.Ehow the gross and histological structure of the kidney facilitates urine production during: 1) glomerular filtration, 2) tubular reabsorption, and 3) tubular secretion.
Urine production is facilitated by the kidney's gross and histological structure during glomerular filtration.
What is the kidney's histological structure?
The kidney is divided into numerous lobes that are arranged in a pyramidal structure, with the cortex making up the outside portion and the medulla the interior portion. Nephrons, which make up the majority of the kidney's one million functional units, are connected to a network of collecting tubules.
What kidney organelles are in charge of producing urine?The nephrons of the kidneys filter blood and create urine through a process of filtration, reabsorption, and secretion. Your blood is filtered by the glomerulus, while waste is removed from and returned to your blood by the tubule.
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What is the distinction between the accuracy of the system that shows the processes and cells involved in this growth and development and the actual process of cellular division in the human changes?
Here is the photo of the system
The distinction between the accuracy of the system that shows the processes and cells involved in this growth and development and the actual process of cellular division in the human changes is its more comprehensive and detailed.
What is a Cell?This is referred to as the simplest unit of life and undergoes aggregation to form tissue and organs which are important in the daily functioning of the body.
The system that shows the processes and cells involved in this growth and development are always in a clearer and brief form when compared to the actual process of cellular division in the human changes.
The clearer form makes it to be more comprehensive and detailed to the subject involved which is therefore the reson why it was chosen as the correct choice.
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4. today's lab included an example of a colorimetric assay. what other colorimetric assays have you used or discussed in other labs or science classes? list 2-3 examples and indicate what type of molecule or structural feature that each colorimetric test would detect/identify.
In colorimetric tests, chemicals that change color noticeably when the analyte is present are used. In biochemistry, they are frequently used to check for the presence of enzymes, certain substances, antibodies, hormones, and many other analytes.
For instance, an enzyme called alkaline phosphatase transforms the compound para-Nitrophenyl phosphate into a yellow substance. After binding to proteins, Coomassie Blue causes a spectrum shift that enables quantitative dosing. The Bicinchoninic acid assay, a related colorimetric assay, gauges protein content by a chemical process.
Enzyme-linked immunochromatographic use enzyme-complexed antibodies to detect antigens. The binding of both the antibody is commonly deduced from the change in color of reagent such as TMB.
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41. Hydrolysis of a fat results in A. glycerol only. B. fatty acids onlyC. glucose only. D. two monosaccharides. E. both glycerol and fatty acids.
Hydrolysis of fat results in E: both glycerol and fatty acids.
Hydrolysis is a process that can break down oil or fat and release glycerol and fatty acids. In the process of hydrolysis of oils and fats, ethanolic KOH reacts with oil to form fatty acids and glycerol. Production of fatty acids and glycerol from oils or fat is important, especially in oleochemical industries. Both glycerol and fatty acids are largely used as raw materials in cosmetics, pharmaceutical industries, food, soap production, synthetic detergents, greases, and several other products.
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The Rule of 70 says that if one divides 70
by the percent value of growth
(expressed as a whole number), the
result will equal the time needed for a
population to
A. triple
B. double
C. maintain zero population growth
D. collapse
The Rule of 70 says that if one divides 70 by the percent value of growth (expressed as a whole number), the result will equal the time needed for a population to maintain zero population growth. Thus, option C is correct.
What is population?
This is the term that is used to refer to the given number of people that are known to live in a particular geographical area. The population dynamics has to do with the way that the population is said to change over a period of time.
The true option about population and population dynamics is Population – Inhabitants of a country; Population dynamics the change in the population.
Therefore, The Rule of 70 says that if one divides 70 by the percent value of growth (expressed as a whole number), the result will equal the time needed for a population to maintain zero population growth. Thus, option C is correct.
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How many chromosomes do most human cells have? (a) 12, (b) 23, (c) 46, (d) 69.
Option C, In humans, there are typically 46 chromosomes, or 23 pairs, in each cell. There are 22 of these pairs, known as autosomes, and they have a similar appearance in both sexes.
The number of chromosomes in sperm or egg cells, often known as gametes, is sometimes referred to as haploid. In humans, gametes are haploid cells with 23 chromosomes—one of each chromosomal pair found in diplod cells—and are hence haploid. For humans, each diploid cell has 46 chromosomes. There are 22 pairs of autosomal, or non-sex, chromosomes among them, and two of them determine sex. Two times as many chromosomes as those in a haploid cell, or 2n, make up the total number of chromosomes in diploid cells (n).
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Check all the attributes that apply to microbial taxonomy: Check AII That Apply a) Can use characteristics such as morphology; pigmentation, presencelabsence of specific genes; evolutionary relatedness b)Brings order to wide diversity of microbial life forms c)Only used for microbes of pathogenic or industrial significance d)Includes the naming of taxonomic groups in agreement with published rules
The attributes that apply to microbial taxonomy can use characteristics such as morphology; pigmentation, presence absence of specific genes; evolutionary relatedness. The correct answer is A.
What is TaxonomyTaxonomy is the phrases nomenclature, identification, and classification are all used to refer to the science of classifying living things.
Organisms are grouped into taxa based on their similarities to one another (s., taxon).
Before it is published in the International Journal of Systematic and Evolutionary Microbiology, a new species cannot be recognized.
Each organism has two names in taxonomy.
E. coli is one instance (E.coli). Both Escherichia and coli are names of species.
Thus, we may state that the attributes that apply to microbial taxonomy can use characteristics such morphology, coloring, the presence or absence of a certain gene, or an evolutionary link. Includes categorizing taxonomic groups according to predetermined rules.
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can you place each example into the appropriate category of scientific evidence of evolution?
Each example can be categorized into the occupational observation of natural selection, the fossil record, biogeography and molecular and anatomical homologies.
OCCUPATIONAL OBSERVATION OF NATURAL SELECTION
1. Insect pesticide resistance development
2. Variations in finch beak sizes on average after wet or dry years
FOSSIL RECORD
1. the discovery of bones from a variety of dinosaur species
2. intermediate creatures that connect whales with extinct land-dwelling ancestors
BIOGEOGRAPHY
1. Australia has a rare collection of marsupial animals
2. Similarity between island species and species on the surrounding mainland
MOLECULAR AND ANATOMICAL HOMOLOGIES
1. Similar forelimb architecture in several mammal species
2. Similar genes and the same genetic language in yeasts, fruit flies, and humans.
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How are chromosomes passed down to offspring in sexually reproducing organisms?
Through mitosis, parents' chromosomes are replicated to create unique cells for offspring.
Offspring receive the majority of their chromosomes from one of their parents.
Chromosomes come in pairs, one from each parent, that code for the same trait.
Offspring receive genes for half of their traits from each parent (ex: chromosomes for eye color from their mother and hair color from their father).
The Correct answer is b) Offspring receive the majority of their chromosomes from one of their parents.
What is Chromosomes?Each cell's nucleus contains the chromosome, which is packed into thread-like filaments. Each chromosome is made up structurally of DNA that is tightly wound around unique proteins called histones. Under a microscope, chromosomes are typically invisible. They only become visible when cells divide, which is the only time they do.Chromosomes are found in all living things, and humans have 23 pairs of them. These 22 pairs of chromosomes are known as autosomes, and both males and females have the same number of them. Allosomes, or the 23rd pair of chromosomes, are unique to each gender. Males only have one copy of each of the "X" and "Y" chromosomes, whereas females have two copies of each.To learn more about Chromosomes refer to:
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biologically, do you think you can distinguish between neandertals and humans? what led you to this conclusion? what other information would you need in order to confirm your argument?
Our braincase and pelvic morphology may reliably distinguish us from Neanderthals, whose bones show a longer, lower skull and a broader pelvis.
With careful measurement, the three small bones of our middle ear, which are essential for hearing, may be easily identified from those of Neanderthals.
When you reach a conclusion, you conclude that something is true after giving it significant thought and considering all relevant data.
Evidence provides support for the arguments given and helps persuade audiences to accept ideas. Evidence comes in various forms, and it varies from one academic field or subject of debate to the next.
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# of trials conducted and why
For experiment “how does the color of lights affect plant growth?”
Plants may do a variety of tasks with the aid of various colored light.
How does light affect plant growth study?The production of plant food, the size and color of leaves, and blooming are all impacted by light intensity. Plants that are cultivated in low light typically have spindly growth and leaves that are light green. Similar plants cultivated under intense lighting typically have shorter, better branches and bigger, dark green leaves.Plants may do a variety of tasks with the aid of various colored light. For instance, blue light aids in promoting vegetative leaf development. Plants can blossom when exposed to red and blue light. Indoor plant growth is greatly facilitated by cool fluorescent lighting.To learn more about plant growth refer to:
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the region between which two points corresponds to the entire a (dark) band?
(B). 2 and 6, The A band, also known as the dark band, is occupied by the entire length of thick myofilaments.
Myofibrils, a unique part of the muscle cell or muscle fiber, contain myofilaments. They contain proteins. They are also known as microfilaments because of their hair-like texture. There are two varieties of myofilaments:
A) Thick filament: Myosin, a protein, makes up this filament. Muscles are elastic and contractible thanks to myosin.
B) Thin filament: This filament's protein constituent, "Actin," aids in the mechanism of contraction.
The complete question is:
The region between which two points correspond to the entire A (dark) band?
(A). 1 and 2
(B). 2 and 6
(C). 2 and 3
(D). 3 and 5
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mother is blood type a and two alleles are heterozygous. father is blood type ab. 1. genotype of mother is . 2. genotype of father is . 3. complete the punnett square to expect genotypes and phenotypes of their offsprings. mother father from the punnett square, 4. the probability of offsprings with blood type a is . answer as a percentage. 5. the probability of offsprings with blood type b is . answer as a percentage. 6. the probability of offsprings with blood type ab is . answer as a percentage. 7. the probability of offsprings with blood type o is . answer as a percentage.
There is a 50% probability for a blood type A child and a 50% probability for a blood type O child.
Heterozygous individuals are not healthy carriers. They have the same impairment as homozygous dominant individuals. be normal. The Punnett square is a standard tool used by genetic counselors.
The presence of two different alleles at a particular locus. A heterozygous genotype may include a normal allele and a mutant allele, or two different mutant alleles compound heterozygote
Organisms are either homozygous dominant or homozygous recessive When an organism has two different alleles for a particular gene, it is said to be heterozygous heterozygote means different heterozygous individuals are not healthy carriers. They have the same impairment as homozygous dominant individuals. be normal. The Punnett square is a standard tool used by genetic counselors.
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which of the statements are examples of hypotheses?
A scientist predicts that the DNA molecule of the virus contains its genetic material.
A scientist concludes that some viruses contain DNA within their protein shells.
A scientist observes that viruses are composed of a DNA molecule contained in a protein shell.
A scientist proposes that the protein shell of the virus contains its genetic material.
A scientist expects that in a forest that has been contaminated by factory soot, birds will consume more fair skinned moths than dark moths.According to a scientist, in a forest free of soot, birds will consume more dark moths than white-bodied moths.
What are the three primary theories?One type of hypothesis is a straightforward one.difficult theory direction-based theory.
What is an example of a hypothesis?A straightforward hypothesis can indicate that there is a causal relationship—that is, that one variable affects the other—between two variables.Here's an illustration:Higher grades are the result of more time spent preparing for an exam.In this statement, the independent variable is the number of hours spent studying, and the dependent variable is the outcome.
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The pedigree below shows the inheritance of free earlobes and attached earlobes in 5 generations of a family. Attached earlobes are caused by a recessive allele (f). How many children of individuals 1 and 2 have free earlobes?
A. 0
B. 1
C. 2
D. 3
E. 4
Pedigrees
GenerationsSymbolsApplicationStep 1: DefineLet's label the pedigree so that we can understand it better.
The first generation would start at the top, with the last generation at the bottom.
Individuals 1 and 2 are the first generationIndividuals 3, 4, and 5 are the second generationIndividuals 6, 7, 8, and 9 are the third generationIndividuals 10, 11, 12, and 13 are the fourth generationIndividual 14 is the fifth generationAs the key mentions, colored-in squares and circles signify whether a male or female, respectively, has attached earlobes or not.
Individuals 1, 4, 10, 11, 12, and 13 all have attached earlobesIndividuals 2, 3, 5, 6, 7, 8, and 9 all have free earlobesStep 2: WorkLet's now find the answer to our question.
[Pedigree] Look for the first generation:∴ the answer to our question is B. 1.
___
Topic: Biology
Unit: Genetics II
the enzymes that catalyze cellular reactions are macromolecules made of organic compounds composed of carbon, hydrogen, oxygen, and nitrogen. these types of macromolecules are known as –
a. starches
b. proteins
c. fats
the enzymes that catalyze cellular reactions are macromolecules made of organic compounds composed of carbon, hydrogen, oxygen, and nitrogen. these types of macromolecules are known as protein.
The body is made up of protein, which may be found in almost every organ, tissue, and body part, including muscle, bone, skin, and hair. It contributes to the production of haemoglobin, which transports oxygen in the blood, and enzymes, which drive numerous chemical reactions. You are made up of at least 10,000 different proteins, which also keep you that way.
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Which of the following is a cause of a DNA mutation?
O Changes in DNA
O Changes in chromosomes
O Changes in gene
O All of the above
The cause of DNA mutation is changes in DNA (option A).
What is mutation?Mutation is any heritable change of the base-pair sequence of genetic material.
Mutation can also be referred to as a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
There are a variety of types of mutations, however, the two major categories of mutations are as follows:
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organ systems of the human body include the circulatory, respiratory, digestive, nervous, muscular, and skeletal systems, along with several others. what best describes the relationships among these systems? a. each system functions independently of the other systems. b. each system depends on the function of one or two other systems at the most. c. each system generally depends on the functions of a few other systems, but sometimes functions independently. d. each system depends on the functions of the other systems, and could never function independently.
organ systems of the human body include the circulatory, respiratory, digestive, nervous, muscular, and skeletal systems, along with several others. what best describes the relationships among these systems
b.Each system depends on the functions of the other systems, and could never function independently.
All of the bones, cartilage, tendons, and ligaments in the human body make up the skeletal system. A person's skeleton takes up around 20% of their total body weight, according to a reliable source.
The 206 bones in an adult's skeleton are number. Because some of the bones, such as those in the skull, fuse together as people age, children's skeletons actually have more bones than adults.
The skeletons of men and women differ in a few other ways as well. The average male skeleton is longer and has more bone mass. Contrarily, the female skeleton has a wider pelvis to allow for pregnancy and childbirth.
The skeletal system can be divided into two parts, known as the axial skeleton and the appendicular skeleton, regardless of age or gender.
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according to the size principle of motor recruitment, in what order will muscle fibers be recruited during activity?
Answer:
Smallest to largest (fewest fibers to most fibers).
Explanation:
Motor units typically go from smallest to largest as contraction increases. This is known as Henneman's Size Principle.
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which of the following could be described as a cranial (pertaining to the head) adaptation of mammals? a) a reduced number of ethmoturbinals (scroll-shaped bones in the nose) b) a double-jointed jaw c) a hard palate that completely separates the nasal cavity and oral cavity d) the presence of only one middle ear ossicle for sound transmission
Mammals' middle ear ossicles connect the exterior and inner ears by sitting in a space filled with air.
Describe a primate skull?The primate cranium is a highly integrated, sophisticated structure that performs a variety of essential tasks such as protecting the brain and its appendages (primarily the eyes), respiration, olfaction, food acquisition, and mastication (Lieberman et al., 2008)
How can one identify if a cranium belongs to a primate?The orbital convergence and orbital frontation, the postorbital bar, and an increase in cranial base flexion together with a decrease in cranial base angle are characteristics that set the primate skull apart from those of the majority of other mammals.
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similar to the regulation of body temperature, blood glucose level regulation in humans involves the process of negative feedback. drag the labels to show how blood glucose level is maintained within a narrow range.
The pancreas releases insulin, which causes glucose to enter body cells and raises blood glucose levels above normal. Reduced blood glucose levels.
When blood glucose levels are low, what should happen first?As a result, the blood glucose level is kept steady. Therefore, the proper chain of events is a fall in blood sugar level followed by an increase in circulating glucagon, which causes the release of glucose from glycogen and a rise in blood glucose level. Consequently, choice is the right response (C).
Which of the following contributes to the homeostasis of blood sugar?Cells use blood glucose to make energy when it enters the cells thanks to insulin. Together, insulin and glucagon provide homeostasis, the stable state of conditions within the body.
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The area where the cornea and sclera meet is called?
The limbus is the point where the clear cornea meets the white sclera.
The robust outer tunic of the eye is made up of the cornea and sclera, which withstands the intraocular pressure from within and shields the contents from external mechanical harm. The cornea is the main structural element of the eye's optical system, and it is the interface between the cornea and the air that contributes the majority of the eye's total dioptric power—nearly three-quarters. It is translucent, curved, and has smooth surfaces that meet high optical requirements. Its exterior surface in particular is smooth. The mammalian eye's globe generally resembles a spherical, occasionally being slightly flattened in the antero-posterior direction so that the curvature of the cornea and sclera are identical.
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question 8 which of the following are likely sources of human dietary phosphorus? a. protein and hydroxyapatite b. protein and aminobisphosphonate c. dna and rna d. phosphoric acid and calcium
The correct option is C : Because they have a phosphate backbone, nucleic acids are sources of phosphorus in food. Nucleic acids include RNA and DNA.
Although "Diets rich in protein and calcium" were suggested as diets that would probably satisfy phosphorus needs, protein and calcium do not contain any phosphorus on their own. Protein-incorporating biological amino acids do not exist.
Many foods naturally contain phosphorus, but dairy, red meat, poultry, shellfish, legumes, and nuts are the largest sources.
These foods contain what is referred to as organic phosphorus. Animal foods absorb it more effectively than plant foods do.
A component of DNA, RNA, bones, and teeth is phosphorus [1]. Phosphorus, in the form of phospholipids, is also a constituent of ATP, the body's primary energy source, and the structure of cell membranes.
The body phosphorylates a large number of proteins and carbohydrates.
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Inducible and repressible systems are similar in that
Inducible and repressible systems are similar in that in both systems the regulatory molecules function by binding to the operator.
An operon is a structural group of genes that are expressed or controlled by a single promoter and is considered the functional unit of genomic DNA.
Similarities between inducible and repressible operons:Inducible and repressible operons are two types of operons in prokaryotic gene organization.Both contain functionally related genes juxtaposed in the genome.Gene regulation of both operons also falls under the general regulatory elements.Moreover, their differential regulation is based on the type of molecular effector that binds to the repressor. When activated, the repressor binds to the promoter-operator region and directs the RNA polymerase to bind to the promoter regionThis question is multiple choice:
a) both systems usually control catabolic pathways.
b) both systems usually control biosynthetic pathways.
c) both systems block transcription through the presence of a regulatory protein.
d) both systems are unique to prokaryotes.
e) in both systems the regulatory molecules function by binding to the operator.
So, the true choice is E.
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1.The most primitive members of the animal kingdom are the a.worms b.cnidarians c.sponges d.mollusks 4.Match the sponge cell type to its function/description. a.covers the outer surface of the body b.uses flagella to move water through the sponge body c.secretes spicules d.creates the hole that water passes through to enter the channels. 1.porocyte 2.epidermal cell 3.collar cell 4.amoebocyte
The answers to both questions are given below:
Sponges are considered as most primitive members of the animal kingdom.
1. Porocytes- creates the hole that water passes through to enter the channels.
2. epidermal cells- covers the outer surface of the body.
3. collar cells- uses flagella to move water through the sponge body.
4. amoebocyte- secretes spicules
The phylum Porifera contains the most basic multicellular sea organisms. Mesophyll fills the space between the two cell layers, which resemble tissues in their body composition. The body's numerous pores and channels allow for direct interaction with the water around it. The unspecialized nature of Sponges' cells and the absence of their neurological, digestive, and circulatory systems contribute to their simplicity.
Through small holes, water enters the sponge's spongocoel and escapes through the osculum.
Choanocytes (collar cells), which fill the spongocoel, have flagella that propel water through the spongocoel and produce a current.
Sponge pumps can move up to five seconds' worth of water, which is roughly equivalent to the sponge's body size.
Members of the phylum Porifera include sponges.
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PLS HELP ME?!?
What are the two main classes of minerals?
A silicate and carbonate
B silicate and nonsilicate
C quartz and halite
D quartz and mica
Answer:B
Explanation:
Answer:
the answer should indeed be the second letter B
neurotransmitter chemicals are released by .a) the presynaptic membraneb) cell bodiesc) schwann cellsd) axon hillocks
Neurotransmitters are endogenous—produced inside the neuron itself. When a cell is activated, these neurochemicals are released into the synapse from specialized pouches clustered near the cell membrane called synaptic vesicles. Hence, the answer is a) presynaptic membrane.
A neuron produces a chemical signaling substance called a neurotransmitter, which can affect another cell across a synaptic gap. Any important gland, target cell, muscle cell, or organ that receives the signal may also be a neuron.
In the synaptic cleft, neurotransmitters are released from synaptic vesicles and can interact with receptors on the target cell. The receptor to which the neurotransmitter binds determines its effect on the target cell. Numerous neurotransmitters are produced from straightforward, abundant precursors like amino acids, which are routinely converted in a restricted number of biosynthetic steps.
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which piece of evidence supports the argument that land plants evolved due to presence of microbes?(1 point)
Land plants have chloroplasts, which are like those in cyanobacteria and enable them to do photosynthesis.
The purpose of evolution?According to the theory of evolution, sophisticated organisms evolved from simpler ones. The subject of evolution has been approached from a variety of angles. The presence of structures shared by both species serves as a resounding indication of a connection between them.
what connection exists between microorganisms and plants?Because land plants' chloroplasts, which enable them to perform photosynthesis, have a structure resembling that of cyanobacteria, this is evidence that suggests that land plants developed as a result of the presence of microorganisms.
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