Answer:
In RNA thymine is replaced by uracil
Which two criteria are least important for engineers to consider when
developing a process to produce ammonia?
A. The process should be able to be performed safely.
B. The reactants should come from natural sources.
C. The process should use familiar technologies.
D. The environment around the chemical plant should be protected.
In order to create ammonia, the procedure must be done safely, and the area all around chemical plant must be safeguarded.
The correct answer is D,A
Is Ammonia's natural habitat?In soil, air, and water, ammonia can be found naturally throughout the environment. The nitrogen cycle, which already takes place as fertilizer for plants, also renews ammonia naturally. Ammonia does not bioaccumulate and does not survive long in the environment because of this natural mechanism.
Describe ammonia?A gas made of nitrogen and hydrogen, ammonia (NH3), is colorless. Strong urine or sweat-like aroma can be detected in it. In addition to naturally existing in the air, water, and soil, ammonia can also be found in plants, animals, and the human body.
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Answer:
The answer is B and C
Explanation:
New technology has both positive and negative effects. Most kinds of technology can be deadly if not used correctly. Short-term consequences are not as important as long-term consequences.
a cricket has a diploid genome of 1.2 billion base pairs. assume that there are about 200,000 individuals in the population and that the mutation rate is one per 100 million base pairs. on average, how many new mutations will occur in an individual cricket?
New mutations will occur in 2,400,000 crickets.
Information given in the question:
There are 1.2 billion base pairs in the cricket's diploid genome.There are 200,000 people in the population.1 mutation per 100 million base pairs is the mutation rate.Therefore,
Number of mutations per individual = Total number of bases × Mutation rate= 1.2 billion × 1 per 100 million base pairs
= 1,200,000,000 × (1 ÷ 100,000,000 )
= 12 mutations per individual
Therefore,
Number of new mutations in the given population= Number of Mutations per Individual ×Total Number of Individuals
= 12 × 200,000
= 2,400,000
New mutations will occur in 2,400,000 crickets.
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15. a stream runs through a mountain forest. willow trees grow on each side of the stream. a small deer population feeds on the willows. mountain trout rely on the willow shade for shelter. the apex predator in the forest is the mountain lion. the mountain lions primarily eat deer, but also eat rodents, and fish, as well as other prey species. analyze the components of the ecosystem. what is the most likely outcome if the mountain lion population vanishes? (1 point)
The most likely outcome if the mountain lion population vanishes The trout population will decrease.
A mountain is an extended part of the Earth's crust, normally with steep facets that show good sized exposed bedrock. Even though definitions vary, a mountain might also fluctuate from a plateau in having a confined summit area, and is typically higher than a hill, usually rising at the least three hundred metres above the encompassing land.
Forms of mountains: There are 5 primary kinds of mountains: volcanic, fold, plateau, fault-block and dome. A more distinctive classification beneficial on a nearby scale predates plate tectonics and adds to these classes.
They usually have steep, sloping facets and sharp or rounded ridges, and a high factor, known as a top or summit. Most geologists classify a mountain as a landform that rises at least 1,000 ft (three hundred meters) or greater above its surrounding place. A mountain variety is a sequence or chain of mountains which are close collectively.
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at low intensities (below 25%) what muscle fibers are primarily used/activated to support activity? select one: a. type i b. type i and type iia c. type ii
The correct answer is option B.
At low intensities (below 25%) type I and type II muscle fibers are primarily used/activated to support activity.
What are muscle fibers?
Muscle fibers are type of fibers which regulate the physical forces & activities inside the body.
The chemical composition of muscle fiber shows that they are made up of particular group of muscles - called fascicles which are protected by a layer of connective tissues.
In general, there are three types of muscles fibers: (1) slow oxidative (2)fast oxidative and (3) fast glycolytic.
Overtime, the size and composition of muscle fibers changes in order to meet the changing demands of the body.
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Give an example of temporal isolation and explain how temporal isolation is preventing reproduction within the population.
When many species reproduced at various periods, there is a condition known as temporal isolation. Three different orchid species, for instance, coexist in the very same rain forest. For seeds to be produced, each species has blooms that only last a single day and should be pollinated on the day that.
In biology, temporal isolation would be a form of reproduction isolation strategy that prevents members of similar species from mating and creating hybrid offspring. This mechanism is caused by variations in the timing of crucial reproductive events.
A reproductive barrier restricts cross-pollination between two populations, which eventually results in speciation. The populations of cicadas are a good illustration of temporal separation so because two species don't really interbreed since they would not mature at the same time.
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rickets is an inherited form of bone disease that is due to an x-linked dominant allele. if a man who has rickets marries and has children with a woman who does not have this disease, what is the probability that their sons and daughters will have the disease?
There is 100% probability of the daughters of having the rickets disease and 0% probability that son’s would inherit the disease.
A lack of vitamin D or calcium is the most common cause of rickets. Vitamin D largely comes from exposing the skin to sunlight, but it's also found in some foods, such as oily fish and eggs. Vitamin D is essential for the formation of strong and healthy bones in children.
In rare cases, children can be born with a genetic form of rickets. It can also develop if another condition affects how vitamins and minerals are absorbed by the body
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if nirenberg and matthaei performed their cell-free translation experiment using an mrna composed of 60% c and 40% a, what radiolabeled amino acids would be incorporated into the precipitated polypeptides? (check all that apply.) check all that apply phenylalanine phenylalanine leucine leucine isoleucine isoleucine proline proline methionine methionine valine valine serine serine threonine threonine alanine alanine tyrosine tyrosine histidine histidine glutamine glutamine
Phenylalanine, Leucine, Isoleucine, Methionine, Valine, Serine, Alanine, Tyrosine, Aspartic acid, glutamic acid, Cysteine, Tryptophan, Arginine and Glycine are the radiolabeled amino acids would be incorporated into the precipitated polypeptides.
What is polypeptide and its function?
Polypeptides assist make up proteins via way of means of bonding several amino acids together. Proteins are created via way of means of the bonding of or greater polypeptides, that are then folded into a particular form for a specific protein.
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which is not true about disturbances? they occur only on short time scales. they are caused by natural events such as hurricanes. some are due to anthropogenic causes. they can cause complete destruction of an ecosystem.
The statement that is not true for disturbances is 'they can cause complete destruction of an ecosystem'.
Ecological disturbance is a non-biological or biological event or force that alters the spatial organization of organisms in the ecosystems they live in as well as their mortality. The nature of entire ecosystems as well as the organization of particular populations are significantly shaped by disturbance.
Even though disturbances frequently have a negative impact on the populations of native plants, animals, and other organisms in a given environment, they can also provide fugitive species a chance to enter and establish themselves in ecosystems where their biological communities once were excluded.
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if heterozygous round crossed with homozygous round produce 2400 plant how many plant are pure round
If a heterozygous round plant is crossed with a homozygous round plant then from the 2400 plants produced, 1200 will be pure round plants. Pure round plants are homozygous for the trait.
What are genes?Genes are the units of hereditary information. Genes carry the genetic information about the various characteristics in an organism in the form of sequences of amino acids and nucleotides.
Mendel described in his laws that genes present on DNA carry the genetic information which is transferred to the offspring during reproduction. Each gene has a pair of alleles which are responsible for contrasting character such as in case of plant height, two alleles are present from which one is dominant which is tall and the other one if short or dwarf which is recessive.
The number of plants which are pure red = 1/2 of the total plants produced or 50% of the total F1 progeny.
Thus, number of pure round plants = 1/2 × 2400
Number of pure round plants = 1200
Therefore, there will be 1200 pure round plants produced by the cross between heterozygous round plant and homozygous round plant.
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The bony projections that can be palpated medially and laterally at the wrist are the?.
The bony projections that can be palpated medially and laterally at the wrist are the: medial and lateral epicondyles. The lateral epicondyle is placed on the outer side of the elbow.
What are the medial and lateral epicondyles?The medial epicondyle is a secondary growth center at our elbow. It first appears around age 6. Then, at the age of 14-17, it fuses to the shaft of the humerus.
Meanwhile, the lateral epicondyles are the unique feature found on long bones that are responsible as a point of attachment for tendons and ligaments. Besides that, epicondyles also serve as a point of attachment for the bone-to-muscle connection.
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Using the information from problem 4, scientists do a further testcross using a heterozygote for height and nose morphol- ogy. The offspring are tall-upturned snout, 40; dwarf-upturned snout, 9; dwarf-downturned snout, 42; tall-downturned snout, 9. Calculate the recombination frequency from these data, and then use your answer from problem 4 to determine the correct order of the three linked genes
The correct answer is :
T-A exp. = 12 map units A-S exp. = 5 map units T-S exp. = 18 map unitsAn layout that is consistent with the data is: T then A then S
Tallness and Snout:
40 tall-upturned snout = 40% expected
42 dwarf-downturned snout = 42% expected
9 dwarf-upturned snout = 9% recombinant
9 tall-downturned snout = 9% recombinant
Total = 100%
Consequently, the rate of recombination between genes T and S is 18%.
By utilizing the % frequencies as distances, one may calculate the relative frequency between genes.
From tests 1-3, the recombinant relationships are as follows:
1 T-A exp. = 12 map units 2 A-S exp. = 5 map units 3 T-S exp. = 18 map units
An layout that is consistent with the data is: T then A then S
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rna viruses that infect animal cells always encode the enzymes needed to replicate their genomes because
Because host cells usually lack the appropriate enzymes, RNA Virus always encodes the enzymes needed to copy its genome.
Classification of Viruses Based on Nucleic Acid Type
Some viruses are classified based on the type of nucleic acid, including:
1. DNA viruses
DNA viruses are viruses in which the nucleic acid is DNA, for example parvovirus.
2. RNA viruses
RNA viruses are viruses in which the nucleic acid content is RNA, for example picornavirus.
UNDERSTANDING VIRUS
The word "virus" comes from the Latin word virion, which means poison. The virus itself is always developing from time to time, so you can say it is very difficult to die or disappear. In fact, it is possible that new viruses will appear which can sometimes make humans or other living things sick.
Viruses are part of microorganisms. Named part of microorganisms because they are living things with a size of only a few microns or maybe smaller than that, because 1 micron is equal to 0.001 mm. Based on the above understanding of viruses, it can be said that viruses are parasitic organisms, which require a host to survive. These microorganisms must find a host to reproduce, including through human cells.
Without hitching a ride onto its host's body, it cannot self-replicate. Some species of these organisms can even kill their host cells in order to reproduce. If it does not find a host, the virus cannot live for very long.
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Bees use a combination of visual and chemical cues within flowers to locate those same flowers that contain nectar. All BUT ONE choice is a cue that aid bees in finding food.
A waggle dancewaggle dance
B floral scentsfloral scents
C nectar guidesnectar guides
D nectaries
The option that will not help the bees to find food will be the floral scents, so the correct option is B.
What is the function of the floral scents?Sometimes the floral scent will help to be olfactory signals for pollinators, but this can also disorient the bees due to the aromas that can be changeable in the flowers, such as when the plant may lack water and stress it, making it defensive, altering its scent.
This can then upset the bees and disorient them as to where they need to go to pollinate.
Therefore, we can confirm that the correct option is B. floral scents.
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a bird occupies a territory in which there are abundant food sources but also high levels of predation. this is an example of
a bird occupies a territory in which there are abundant food sources but also high levels of predation. this is an example of economic defensibility
The economic defensibility replica describes human territoriality by considering the values and advantages of saving assets that differ in solidity and sureness. A human would also occupy the territory with abundant food sources where a bird does in high levels of predation. We conducted a relative study of 30 pastoral societies in Africa to describe the difference in holding systems using the economic defensibility replica. Mainly, we tested under what ecological conditions we find open property authorities against common property authorities. ,More over we considered how pastoralists’ connection with the outside world shaped property authorities by considering the role of limitations and synopsis. Our outcome didn't carry for the economic defensibility model across African pastoral societies: open and common property authorities are found under same ecological conditions. Instead, we find that pastoral societies that are circumscribed are more likely to have common property authorities. We suggest that open property authorities are the default regime in pastoral societies and that common property regimes are a response to circumscription by other groups.
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3 raised to the 3 powerh can be used to radioactively label molecules that contain h atoms. why would 3 raised to the 3 powerh be a poor choice to use in the hershey and chase experiment?
³H can be used to radioactively label molecules that contain H atoms. The reason ³Hbe a poor choice to use in the Hershey and Chase experiment is because:
Hershey and Chase aimed to demonstrate the existence of DNA as genetic material. They picked the ³²P Phosphorus radiolabel isotope for DNA and the ³⁵S Sulfer radiolabel isotope for Protein. The radiolabel isotopes ³²P Phosphorus and ³⁵S Sulfer are only found in DNA and Protein, respectively.
If they utilize the ³H hydrogen isotope, they cannot verify that the DNA is genetic material because the ³H isotope is found in both protein and DNA. That is why ³H is a bad decision.
What is the Hershey and Chase experiment?The Hershey-Chase studies, undertaken in 1952 by Alfred Hershey and Martha Chase, helped to prove that DNA represents genetic material.
The Hershey and Chase studies were significant because they established conclusively that DNA was the genetic substance contained in genes.
This cleared the door for further studies in cell biology and genetics, such as whole genome projects and the identification of genes associated with certain traits/conditions.
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true or false: the 1988 yellowstone fires were a tragedy that permanently destroyed many unique habitats.
Yes the 1988 yellowstone fires were a tragedy that permanently destroyed many unique habitats and environment.
The Greater Yellowstone Area, which covers 4.8 million hectares of "primarily public land in Wyoming, Montana, and Idaho," is where the actual fires took place. The fires, which were burning at varying intensities, burned a lot of lodgepole pines and other trees but mostly spared most other plants. When coupled with the summer drought conditions, some of the northern range burnt, which had an impact on the habitat and winter survival of grazing animals. Fires significantly changed the habitat , environment and food production of Yellowstone in many other ways as well.
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Which of the following statements illustrates functional fixedness? I have only seen metal desks, therefore only metal can be used to make desks. Corn may only be used to produce ethanol because it is yellow. A person who is four feet tall may or may not be able to drive a school bus. Chairs are not always made of wood, but some chairs are made of wood.
The statement which illustrates functional fixedness is that I have only seen metal desks, therefore only metal can be used to make desks and is denoted as option A.
What is Functional fixedness?This is referred to as a cognitive bias that impacts an individual's ability to be creative. This is used to explain why a substance is only used for the main purpose and not for other purposes.
Option A states that only metal can be used to make desks which is a good example of functional fixedness as it can also be used for other purposes which is therefore the reason why it was chosen as the correct choice.
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give a description of the endosymbiont theory of plastid origin. how many times might chloroplasts have arisen?
Chloroplasts have arisen three times according to the endosymbiont theory.
According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms. The host cell and the endosymbiont each have a set of cell membranes that enclose the chloroplasts that resulted from primary endosymbiosis. When a eukaryotic cell absorbs a cell that has already experienced primary endosymbiosis, secondary endosymbiosis takes place. They surround the chloroplasts with more than two sets of membranes, as in chloroplasts of brown algae. When a eukaryotic cell assimilated another eukaryotic that was the product of an earlier secondary endosymbiosis, this process is known as tertiary endosymbiosis.
Therefore, chloroplast, as well as mitochondria, have occured thrice and are very different from the current prokaryotes like cyanobacteria.
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leslie has a severe sore throat and the lymph nodes in her neck are swollen. this would indicate that a) the focus of the infection is the lymph nodes. b) lymph is not flowing consistently through these lymph nodes. c) the lymph nodes contain an increased number of lymphocytes. d) the lymph nodes are actively producing phagocytes. e) the lymph nodes have increased their secretion of thymosin
leslie has a severe sore throat and the lymph nodes in her neck are swollen. this would indicate that c) the lymph nodes contain an increased number of lymphocytes.
What condition results in enlargement of the glands in the throat and neck?An upper respiratory infection is the most typical cause of enlarged lymph nodes, although there are other potential reasons as well. Consult your healthcare physician if they are enlarged without a clear explanation in order to rule out anything more dangerous.
Near an illness, lymph nodes or glands enlarge to aid in the body's defense against the infection. On occasion, a gland on one side of the body can enlarge. Other symptoms like a sore throat, a cough, or a high temperature might also be present.
The immune system of the body includes the lymph glands, often known as lymph nodes. In order to cleanse the body of infection, they gather and filter liquids.
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this structure of the medulla oblongata relays information from the red nuclei, midbrain, and the cerebral cortex to the cerebellum.
E the hypothalamus. The red nuclei, midbrain, and cerebral cortex communicate with the cerebellum through this medulla oblongata structure.
What sends information from the cerebral cortex to the cerebellum?The lowest portion of the brain, the brainstem, is situated in front of the cerebellum and is attached to the spinal cord. The midbrain, pons, and medulla oblongata are its three constituent parts. It acts as a relay station, transmitting messages back and forth between the cerebral cortex and various bodily regions.
What parts of the medulla transmit impulses to the cerebellum?Pons: Located in the brainstem, the pons joins the thalamus and medulla oblongata. It consists of tracts that transmit impulses from the motor cortex to the medulla, thalamus, and cerebellum.
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the protein molecule formed in-vivo when a foreign material is introduced into an immunocompetent individual is a
Antibodies are protein molecules that the body produces in reaction to the introduction of foreign substances (also known as antigens or immunogens).
When an organism's immune system comes into contact with a foreign molecule for the first time (usually a protein), specialized cells like dendritic cells and macrophages seize the molecule and start to break it down so that they can transmit these antigens to B cell lymphocytes. A process known as somatic hypermutation enables the B cell to start coding for a new antibody after antigen presentation to the B cell lymphocytes has taken place. This antibody will have a distinctive Antigen Binding Site in the variable region that can bind specifically to an epitope from the antigen.
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9. a scientist is trying to classify a new organism. she observes that the organism is a microorganism. it is prokaryotic, and reproduces through binary fission. it was found living in a hydrothermal vent. what is the best classification for the organism?
The organism that is categorized by scientists is called Archaea. Asexual reproduction is the function of binary fission in prokaryotes. The straightforward method by which prokaryotes divide and multiply is known as binary fission.
The earliest single-celled microbes on Earth are prokaryotic cells. Bacteria and archaea are prokaryotes. Cyanobacteria are among the prokaryotes that carry out photosynthesis. Since a prokaryotic cell only has one membrane, all processes take place in the cytoplasm.
Numerous factors, including general similarities, colors, ecological roles, etc., can be used to categories organisms. But it is generally acknowledged that classifying organisms based on their shared evolutionary history provides scientists with the most helpful way to organize biological variety.
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Select the most accurate example of a food chain:
grass--->Rabbit--->snake--->hawk
rabbit--->hawk--->grass--->snake
snake-->rabbit--->grass--->hawk
hawk--->snake--->rabbit--->grass
Answer:
The last one;
hawk--->snake--->rabbit--->grass
Explanation:
Answer:
grass--->Rabbit--->snake--->hawk
Explanation:
the grass is the producer(as it has energy) so the rabbit eats the grass,then the snake eats the rabbit and then the hawk eats the snake
The nerve fibers of which cranial nerve pass through the foramina of the cribriform plate?.
Nerve fibers of the olfactory nerve pass through the foramina of the cribriform plate. Thus the correct answer is the olfactory nerve.
The shortest nerve in the human head is the olfactory nerve. It begins in the mucous membrane that lines the roof of your nasal cavity, the olfactory mucosa (nostril). This nerve is composed of several tiny nerve fibers known as fascicles that are connected by connective tissue strips.
The bundle exits your nose through the ethmoid bone and travels behind your nose. The fascicles then move inside the olfactory bulb, a structure. Each nostril has a bulb, and those bulbs transmit information to the brain through the olfactory tract.
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How can the problem of pollution in the shatt al-arab river be solved
Answer: The conflict started first off because of people dumping solid waste and sewage into the river. So in order to resolve this conflict people should really just stop littering waste into the river which damages it and causes pollution which is just the thing that we need right now.
Explanation: I hope this helps!!!!!!!!!!
in a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of: group of answer choices conservation. expression. translation.
In a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of selection.
Mutations are a change in the DNA sequence in a living being. It can result from various things, such as exposure to mutagens, viral infection, or errors in DNA replication during the cell division process. Random mutation plays a really important part in the theory of evolution by natural selection. In that theory, mutations give rise to adaptation that is passed on to offspring, which changing their chances of survival. Organisms that had harmful random mutation would me killed, therefore not able to create offsprings and eventually eliminated from nature.
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the rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ion(s)?
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to Na⁺ ion.
The depolarization is caused when Na⁺ ions rapidly enters into neuron through open sodium channels. Sodium ions plays important role in various physiological process such as regulating blood volume, ph regulation, maintaining blood pressure, energy metabolism,osmotic equilibrium, excitation-contraction coupling, maintenance of cellular homeostasis, development and growth.
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red-green color blindness is caused by a sex-linked recessive allele. a colorblind man marries a woman with normal vision whose father was color-blind. what is the probability that they will have a color-blind daughter?
Of all the girls, we have a 50% chance that they be color-blind. Of all the child, there is a 50% chance of having normal vision.
What is the probability that both carrier parents of sickle cell anemia will have a color-blind daughter?A marriage between a colorblind man and a normal woman produces all carrier daughters who are carrier and normal sons. If male is colorblind and the mother is normal then there is 50% chance to produce the colorblind disease.
Males only have 1 X chromosome from their mother and if that X chromosome has the gene for red-green color blindness then they will have red-green color blindness. Females have 2 X chromosomes in which one is from their mother and one from their father.
Genetic red-green color blindness affects males more than females because the genes for the red and green color receptors are located on the X chromosome that males have only one and females have two.
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What do your data tell you about how the
amount of sugar affects the rate of cellular
respiration performed by the yeast?
Remember that a rate involves a change in
amount over time. Does this answer make
sense? Why or why not? (6 points)
CE
In the process of cellular respiration big food molecules such as glucose and sucrose are fragmented into tiny molecules with the release of energy. The process of cellular respiration is important for yeast survival like all other organisms.
Why?
This occur because small particles are rapidly fragmented whereas big molecule like sucrose takes more time. This makes large molecules less organised source of energy for yeast relatively those of smaller molecules.
Yeast can use distinct sugar and non-sugar based molecules as source of energy as follows;
Glucose
Lactose
Sucrose
Glucose is a simplest sugar molecule and yeast do not make much effort for its breakdown. Glucose also enters in glycolysis directly whereas large sugars have to go through hydrolysis process before glycolysis. This means that glucose is more efficient compare to big sugars such as sucrose in meeting energy requirement and providing rapid respiration rate.
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9. during fertilization in flowering plants, one sperm cell nucleus fuses with the egg nucleus, producing the diploid zygote, and the other fuses with the , producing the triploid , which develops into temporary tissue that nourishes the embryo. this process is called fertilization. what tissue nourishes the embryo in gymnosperm seeds?
The other sperm nucleus fuses with the two polar nuclei, producing the triploid cell, which develops as temporary tissue that nourishes the embryo. This process is called double fertilization. The tissue that nourishes the embryo in gymnosperm seeds is the endosperm.
What is double fertilization?Of the two sperm cells, one sperm fertilizes the egg cell, forming а diploid zygote; the other sperm fuses with the two polаr nuclei, forming а triploid cell that develops into the endosperm, temporary tissue that nourishes the embryo. Together, these two fertilizаtion events in аngiosperms аre known аs double fertilizаtion. Аfter fertilizаtion is complete, no other sperm cаn enter. The fertilized ovule forms the seed, where the tissues of the ovаry become the fruit, usuаlly enveloping the seed.
Your question is incomplete, but most probably your question was
The other sperm nucleus fuses with the ..., producing the triploid ..., which develops as temporary tissue that nourishes the embryo. This process is called ... fertilization.
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