Answer: The vacuole is found in some plants cells but not all of them like the Mature cells.
Explanation:
how is it possible for a muscle to shorten during contraction when there is no actual change in the length of the thich and thin filaments
They go past one another, shortening the sarcomere but maintaining the length of the filaments.
What purpose do the filaments serve?Microtubules, actin filaments, & intermediate filaments make up the cytoskeleton of a cell. These elements aid in the organization of the cell's components and give its cell its form. These provide the foundation for cellular division & movement too though.
From what is filament made?Traditional filaments are coils of wire that are housed inside glass bulbs and look somewhat like springs. Due to its high melting point, tungsten is typically used in their construction. The ability of tungsten to withstand heat is essential to the operation of filament lamps.
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Which term matches this definition?
particles with a neutral (no) charge located in the
nucleus of the atom
A. Proton
B. Ion
C. Electron
D. Neutron
Particles with a neutral (no) charge located in the nucleus of the atom are called as Neutrons.
What are the components of atom?
Fundamental building block is an atom. It is the smallest fraction of matter into which electrically charged particles cannot be released. It is also the smallest piece of substance with chemical element-like characteristics. Regardless of whether they have 3 or 90 electrons, all atoms are about the same size.
The atom is made up of a small nucleus and orbiting electrons. Protons are found in the nucleus and have a positive charge that is equivalent to the electron's negative charge. Neutrons, which have essentially the same mass but no charge, may also be present in the nucleus.
Protons, neutrons, and electrons make up an atom.
The nucleus contains protons, neutrons, and electrons that orbit it.
The charges of the protons are positive, the electrons are negative, and the neutrons are neutral.
Hence, neutrons are the particles with neutral or no charge.
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2. Before DNA replication can occur, the double-stranded DNA must first-
A be transcribed into RNA
B be translated into amino acids
C replace deoxyribose with ribose sugars
D separate between the nitrogen base
Before DNA replication can occur, the double-stranded DNA must first be transcribed into RNA.
The first two processes of DNA replication are initiated sequentially. A so initiation protein first releases a little section of the DNA quadruple helix. The two DNA strands are then pulled apart by helicase, a protein that binds to and dismantles the hydrogen bonds holding the bases on the DNA strands together.
The stretch of the double helix that is about to be duplicated must first be unwound already when replication could take place. Additionally, the weaker hydrogen bonds between the coupled bases must be broken in order to distinguish the two strands, much like the opposite wings of a zipper.
Therefore, the correct answer will be option (A).
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the three domain system of taxonomic classification now places protists into their own single kingdom. true or false
Living organisms are now classified into a single kingdoms under third domain system of taxonomical, as shown above.
Given statement is true.
What is taxonomic example?Studying living things including animal, plants, microorganisms, and people in order to categorize them and increase our understanding of them is known as taxonomy. For instance, although from some views people and whales are separate animals, both are classified as mammals and share a common ancestor.
Why is taxonomic classification used?In order to more effectively communicate biological information, it aids in the classification of species. Through hierarchical classification, taxonomy allows scientists to understand and categorize the variety of life on Earth.
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the digestive tract in humans harbors a diverse microbial community, starting with the mouth which is colonized mainly by a number of species of
The digestive tract in humans harbors a diverse microbial community, which is colonized mainly by a number of species of Streptococcus.
Streptococcus is a genus of spherical bacteria that belongs to the family Streptococcaceae. These bacterias produce d-lactic acid, a type of acid that, if produced excessively, can lead to lactic acidosis.
Besides lactic acidosis, these bacteria can also cause many health problems, such as:
Strep throat, which is caused by group A Streptococcus. The symptoms include fever, sore throat, and swollen lymph nodes in the neck.Scarlet fever is also caused by group A Streptococcus.Pneumonia, which is caused by a group B Streptococcus. Streptococcus pneumoniae.Learn more about Streptococcus at https://brainly.com/question/22774534
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which brain structure maintains homeostasis and influences blood pressure, heart rate, digestive activity, breathing rate, and other important physiological functions in the body?
The hypothalamus regulates homeostasis and affects body temperature, blood pressure, heart rate, digestive activity, and breathing rate.
A section of the forebrain located beneath the thalamus. The central nervous system's control and coordination are the hypothalamus' primary responsibilities. The hypothalamus aids in maintaining homeostasis, or body balance.
The major hormones secreted from the hypothalamus include thyrotropin-releasing hormone (TRH) and gonadotropin-releasing hormone (GnRH). The brain's deep structures serve as the body's intelligent control and coordination hub. Its major job is to maintain homeostasis, a constant state of equilibrium in your body. It carries out its function through controlling hormones or by directly affecting your autonomic nervous system.
Thus, the hypothalamus regulates homeostasis, blood pressure, heart rate, digestive activity, breathing rate, and body temperature.
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4.in part ii: separation of chloroplast pigments by paper chromatography, a.what is the purpose of paper chromatography in this experiment? b.what is the independent variable in this experiment? c.what is the dependent variable in this experiment?
Paper chromatography is a technique for sorting compounds according to their numerous characteristics (such as solubility, size, mass, etc.), which enables scientists to differentiate between diverse organic and inorganic components.
How does chromatography work to separate chloroplast pigments?The paper's V-shaped tip is dipped in the chromatography solvent and used as a wick to move the solvent up the paper, separating colours based on how easily they dissolve in it and how much molecular weight they have. The solvent is let to remain on the paper until the topmost pigment band is almost at the top.
In paper chromatography, how are colours separated?As it goes up the paper, the solvent carries the dissolved pigments. Because they are not all equally soluble, the pigments are transported at varying rates.
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which cell is indicated by the arrow? identifying cells of the nervous system which cell is indicated by the arrow? identifying cells of the nervous system microglial neuron astrocyte oligodendrocyte
The arrow points to an oligodendrocyte cell, which is one of the central nervous system's myelinating cells (CNS).
What role does the oligodendrocyte cell play?In the CNS, neurons are wrapped in specialized glial cells called oligodendrocytes. The major task of oligodendrocytes is to produce and maintain the myelin coating that envelops axons. Additionally, they take involved in the shaping of higher order neural systems and axonal control.
What components make up oligodendrocytes?They originated from the mesenchyme cells in the embryonic neural tube. These cells develop into glial cells, which create the progenitor cells for oligodendrocytes. The spinal cord and the brain then undergo oligodendrocyte maturation from these cells.
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What is composed of cells that produce hormones and secrete them into the bloodstream?.
Endocrine glands are made up of cells that release hormones into the bloodstream.
Endocrine glands are also known as ductless glands as they release certain chemical substances called as hormones directly into the bloodstream in the body. These hormones in turn, act on certain specific target organs in order to produce a certain effect.
Endocrine glands vary in shape as well as size. The important ones are the pituitary gland, thyroid gland, parathyroid gland, adrenal or supra-renal glands, pineal gland, etc. Hormones act as chemical messengers in the body. A hormonal imbalance in the body may lead to health-related problems such as obesity, elevated blood pressure or hypertension, etc.
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if a flood causes the death of 50% of small mammals, which population would exhibit the most loss of genetic diversity in its future generations? a. 602 mammals b. 60 mammals c. 600 mammals d. 603 mammals e. 6000 mammals
60 mammals population would exhibit the most loss of genetic diversity in its future generations.
The correct option is B.
Why is genetic diversity?The ability of communities to adapt to changing situations is facilitated by genetic variety. More diversity increases the likelihood that certain members of a group will have allele variations that are appropriate for the environment. Those people have a higher chance of living long enough to have children who carry that allele.
Why is genetic diversity important for species?Genetic variety is alluded to as this. It improves a species' and population's resistance to diseases, pests, climatic changes, and other pressures. Their ability to adapt and evolve is supported by gene variants.
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how does the text explore the relationship between humans and animals? Is black beauty harmed by his relationship with humans? Does he benefit in any way? Cite evidence from the text, your own experience, and other literature, art, or history in your answer
The text explores the relationship between humans and animals by showing the readers that the world is full of beings who should not be treated like objects.
As his name suggests, Black Beauty was renowned for his size and might. However, when bad luck strikes, he is sold to a number of other owners. Some owners are compassionate and treat him with love and respect. Black Beauty is frequently referred to as a horse's autobiography. Black, a young stallion, is the horse (Beauty).
Black Beauty, a charming pre-automobile era horse that was well-bred and of noble birth, tells the tale. After being initially owned by sympathetic masters, he is bought and sold by ever crueler owners. He eventually collapses from overwork and poor treatment, but he is ultimately sold to another sympathetic owner and bounces back.
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As frog embryo develops in its egg, its cells divide.
Which term best describes the structure that is replicated during this cell division?
bacitracin is made naturally by the bacterium bacillus subtilis and is primarily only used to target skin infections caused by gram-positive bacteria. this type of chemotherapeutic drug would best be characterized as a(n) .
bacitracin is made naturally by the bacterium bacillus subtilis and is primarily only used to target skin infections caused by gram-positive bacteria. this type of chemotherapeutic drug would best be characterized as a narrow-spectrum antibiotic.
What is narrow-spectrum antibiotic?Antibiotics with a narrow spectrum are effective against a certain subset of bacterial species. They are only able to affect gramme +ve or gramme -ve, not both.
When the etiological organism is identified, special narrow-spectrum antibiotics are administered. They won't eradicate as many common microorganisms as broad-spectrum antibiotics do. They prevent the spread of illnesses with medication resistance because they only affect a small number of extremely particular bacteria.
antibiotics that are particular to one type of bacteria, such as those that only kill gram-positive or gram-negative bacteria.
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a person with a severe head injury subsequently acts irresponsibly, does not seem to be able to plan effectively, and is easy to anger. which of the following brain areas is most likely injured? responses cerebellum cerebellum hypothalamus hypothalamus parietal lobe parietal lobe frontal lobe frontal lobe corpus callosum
Would there be more ocean floor between the continents or less? Why?
Answer:
Yes there is
Explanation:
There is more ocean flooring than there is land, reason being is there is a lot more water than land. Take a look at pangea there is more water than there is land and its being stopped from reaching the core by the ocean floor and there is a lot of floor on the bottom of the ocean so yes there is more ocean floor between the continents. There is more because pangea broke off into pieces making more room for land
Fill in the blanks DNA REPLICATION
Answer:
leading
Explanation:
leading strand is the new DNA formed after replication. lagging strand is the old DNA strand
What is the best method of checking the temperature of a delivery of fresh fish?.
Answer:
The best method of checking the temperature of a fresh fish, from a delivery is, to "Insert a thermometer probe in the thickest part of the fish".
Explanation:
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URGENT!!!!
CD4 and CD8 activation:
1) Why are CD4+ T cells (T-helper cells) activated by MHC Class II and CD8+ cells of (CTL) is activated by MHC Class I .
2) B-cells and T-cells: signal 1 and signal 2
During these phases, CD4+ T cells have specific functions that control how CD8+ T cell memory is developed.
What are CD4 and CD8 activation?CD4+ T cells during the priming phase boost viral clearance and license the entrance of CD8+ T cells into mucosal tissues.
After interacting with the antigen-MHC complex, naive CD4+T cells get activated and differentiate into distinct subtypes that are primarily influenced by the cytokine milieu of the microenvironment.
Therefore, the development of a virus-specific effector CD4+ T cell and humoral response.
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A therapist uses unconditional positive regard to help a client feel fully accepted. The therapist and the client discuss future goals and focus on the steps needed to live a more complete life.
Which perspective in psychology is the therapist most likely following?
A. humanistic
B. behaviorist
C. psychoanalytic theory
D.functionalism
The perspective in psychology that the therapist most likely following is option C. psychoanalytic theory.
What does therapy mean by unconditional positive regard?Respecting a client as a human being with free will and acting with the presumption that they are doing the best they can, as opposed to enjoying or embracing what they have done, is what is meant by unconditional positive regard.
Note that Robert Carl Rogers Respecting a client as a human being with free will and acting with the presumption that they are doing the best they can, as opposed to enjoying or embracing what they have done, is what is meant by unconditional positive regard.
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Plants in different environments have challenges that only they have. For example, the growth of a plant in a rainforest (e.g., an orchid) might be more affected by different things than a plant in a desert (e.g., a succulent). In three to five sentences, compare environmental challenges that could affect the photosynthetic process of a rainforest plant versus a desert plant.
Explanation:
a rainforest plant will have a great number of large green leaves in order to capture the most amount of sunlight that is able to pass through to the lower levels in the rainforest. Also due to the humidity and low wind speed there isn't a high rate of transpiration.
whereas a desert plant where there is high temperatures, low humidity and high wind speed, plants such as cacti have torn as leaves which blocks the stomata in most cases to prevent water loss and to ward off predators, the cacti has roots that allow it to absorb water before it can evaporate
an organism that thrives in the desert does not do well in a tropical rainforest. when there is plenty of water, shouldn't the organism do even better? explain.
Since these organisms are well adapted to the desert, putting them in a tropical rain forest where there is more than enough water for them will have the opposite effect of what would happen if more water were applied: it will have a negative impact.
Any organic, living system that performs as a standalone unit is referred to as an organism. All living things are made up of cells. Taxonomy separates species into protists, bacteria, and archaea, which are unicellular microorganisms, or multicellular animals, plants, and fungi.
A living item is considered an organism if it has an organized structure, is capable of responding to stimuli, can reproduce, grow, and can adapt to its environment. Therefore, every animal, plant, fungus, protist, bacterium, or archaeon found on Earth would be considered an organism.
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Concept of Terrestrial ecosystems
A terrestrial ecosystem is a community of organisms and their environment that occurs only on land masses, such as continents or islands.
In addition, there are six primary terrestrial ecosystems that are:
TundraTaiga.Deciduous temperate forest.Rain forest.Temperate grasslands and shrublandsshrublandsdesert.
Terrestrial ecosystems are distinguished by their low water availability and the consequent importance of water as a limiting factor, as opposed to aquatic ecosystems. Terrestrial ecosystems are characterized by wider temperature fluctuations, both daily and seasonal, compared to aquatic ecosystems of similar climates.
what does nature refer to in the nature vs. nurture debate? group of answer choices cognitive capacity language acquisition genes and biology environment and culture
In the nature vs. nurture argument, genes and biology are mentioned.
What does "nature" mean in the nature vs. nurture debate?In nature, our DNA is mostly discussed. It contains the genes our parents pass on to us as well as additional genetic characteristics that could affect how our personalities develop and how we mature from childhood. Our personalities are shaped by both nurture and the environment.
Quizlet: Nature vs. Nurture – What is it?Discussion of the factors that affect our conduct and personality: either genetic makeup or life experience solely of nature. Inherent tendencies and genetically determined traits make us who we are. view limited to nurture. From our core, we are all similar to one another at birth, and we are the sum of our experiences.
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why is there different numbers of lobes on the right and left lungs in fetal pig. why would this be the case?
Because the left lung needs to be smaller to make room for the heart, there are differing numbers of lobes on the right and left lungs of fetal pigs.
How do the right and left lungs of a pig differ from one another?Each side of the pig lung is divided into a number of lobes. In contrast to humans, who have three lobes on one side and two on the other, pigs have four lobes on their right lung and three on their left.
How many lung lobes do pigs have compared to how many humans do?Compared to humans, who have three right and two left lobes, swine lungs have two left and four right lobes.
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Organisms in a lake can survive long, cold winters because ice forms a layer of insulation at the top of the lake. What characteristic of water makes this possible?.
Because of the insulation provided by the ice that forms on the lake's surface and the fact that frozen water expands and becomes less dense, organisms in lakes can withstand long, cold winters.
What are an example and an organism?A living creature that has an organized structure, is capable of responding to stimuli, can reproduce, develop, adapt, and preserve homeostasis is referred to as an organism. Therefore, every animal, plant, fungus, protist, bacterium, or archaeon found on Earth would be considered an organism.
What kind of organism is the best example?Organisms are unique forms of life. For instance, every tree in a forest is a living thing. The terms "microorganisms" are often used to refer to single-celled prokaryotes and eukaryotes .
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what kind of molecules serve as electron acceptors in cellular respiration? molecules with low potential energy polar molecules molecules with high potential energy water molecules in an excited state
In the electron transport chain, oxygen serves as the final electron acceptor (ETC).
Which substances can act as electron acceptors?Oxygen, nitrate, iron (III), manganese (IV), sulphate, carbon dioxide, and in some bacteria, chlorinated solvents like tetrachloroethylene (PCE), trichloroethylene (TCE), dichloroethene (DCE), and vinyl chloride are a few examples of electron acceptors (VC).
Is NADH an acceptor of electrons?NADH performs the same role as the food molecule as an electron donor. The oxidoreductases, which transfer electrons from NADH to molecular oxygen, another electron acceptor, are the electron transporters anchored in the mitochondrial membrane.
Is co2 an acceptor of electrons?Methanogenic Archaea use carbon dioxide as a terminal electron acceptor to produce methane as their end product, and various prokaryotic groups use it to create acetate.
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The sulcus that separates the atria from the ventricles is the ____________ sulcus.
The sulcus that separates the atria from the ventricles is the coronary sulcus.
ExplanationThe Heart
The heart is a vital organ that plays an important role in our body. The function of the heart is to receive and pump blood throughout the body. There are large blood vessels in the heart called coronary arteries. Coronary arteries are responsible for delivering fresh oxygenated blood from the heart to the heart muscles.
Coronary Arteries
Coronary arteries are the main blood vessels in the heart and are one of the three main blood vessels that surround the heart. These arteries form the right and left coronary arteries, each of which forms a branch. The left coronary artery originates from the aorta above the left aortic valve and bleeds the left side of the heart. The right coronary artery originates from the right side above the aortic valve. The arteries travel down the coronary sulcus located between the atria and ventricles.
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if the thymus shrank and stopped making thymosins, we would expect to see an immediate decrease in the number of a) b lymphocytes. b) nk cells. c) t cells. d) neutrophils. e) red blood cells.
if the thymus shrank and stopped making thymosin, we would expect to see an immediate decrease in the number of T cells.
Thymosin stimulates the development of pre-T cells in the thymus to mature T cells. Thymosin is the hormone of the thymus, and it initiate the development of T cells. The thymus gland produces soluble hormone-like peptides that can mediate immune and non-immune responses .
T lymphocytes are important part of the immune system and develop from stem cells in the bone marrow. They helps to protect the body from infection and fight cancer. T cells take origin in the bone marrow, they mature in the thymus.
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a gene that controls seed coat color in peas also determines the susceptibility of these peas to a particular disease. this situation is referred to as
The sensitivity of peas to a specific disease is also determined by a specific gene that regulates the colour of the seed coat. Pleiotropy is the term used to describe this circumstance.
Pleiotropy is the term used to describe this scenario, which has been found in a variety of species, including humans.
When an organism is heterozygous, it has two distinct alleles of the same gene. For instance, pea plants can have either homozygous dominant (red-red) or heterozygous red blooms (red-white). They are homozygous recessive if they have white blooms (white-white).
The phenotype of an organism is its outward appearance (FEE ,TIEP). Purple or white flowers would be possible phenotypes for the pea plant's feature of flower colour. Yellow and green seeds, in terms of seed colour,
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list in order the events of blood flow through the heart, starting from the blood entering the atria from the vena cava.
The order of blood flow through the heart is as follows: The body is followed by the inferior and superior vena cava, the right atrium, the tricuspid valve, the right ventricle, and the pulmonary arteries.
The vesical vein is situated where?The right side of your heart is where your superior vena cava or vena cava are located. Your superior vena cava is formed by the union of your right and left ligamentum (or brachiocephalic) veins.
If the venous cava is obstructed, what happens?A blood channel called the superior vena cava transports blood from the upper body back to your heart. Shortness of breath, upper body edema, and other symptoms are possible when this vein is obstructed. Untreated severe cases can be fatal, especially in young patients.
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