Which structure is responsible for allowing material into and out of an animal cell?
Group of answer choices
cell wall
nucleus
mitochondria
cell membrane
Answers
Answer:
4 one opi am pretty sure wait no it the 3 one
Related Questions
What creates biomass
Answers
Answer:
cow dung is the source of biomass
Explanation:
Biomass is renewable organic material that comes from plants and animals. ... Biomass contains stored chemical energy from the sun. Plants produce biomass through photosynthesis. Biomass can be burned directly for heat or converted to renewable liquid and gaseous fuels through various processes.
The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called
Multiple Choice
tissue gas exchange.
systemic respiration.
ventilation.
pulmonary gas exchange.
cellular respiration.
Answers
The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange.
The pulmonary gas exchange process occurs in the lungs during the process of respiration. Alveoli are the tiny sacs in which the oxygen from the inhaled air diffuses across the thin walls into the bloodstream then it binds to haemoglobin in red blood cells. Simultaneously, carbon dioxide diffuses out from the bloodstream into the alveoli and exhaled from the body.
The necessary oxygenation of the body's tissues is ensured by pulmonary gas exchange, which also ensures a new supply of oxygen in the blood and the elimination of carbon dioxide. It supports cellular respiration, which is how cells use oxygen to make energy and is an important step in the whole respiratory process.
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The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange.Pulmonary gas exchange is the process by which oxygen and carbon dioxide are exchanged between the lungs and the environment.
Pulmonary gas exchange occurs between alveolar air and pulmonary capillary blood, resulting in the transfer of oxygen from the air to the blood and the transfer of carbon dioxide from the blood to the air. It is a part of external respiration. In other words, it is the process of gas exchange that occurs in the lungs between the air and blood.Long answerThe exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange. Pulmonary gas exchange is the process by which oxygen and carbon dioxide are exchanged between the lungs and the environment. Pulmonary gas exchange occurs between alveolar air and pulmonary capillary blood, resulting in the transfer of oxygen from the air to the blood and the transfer of carbon dioxide from the blood to the air. It is a part of external respiration.In order to achieve pulmonary gas exchange, a number of factors must be in place.
This means that the alveoli, which are small air sacs in the lungs, must be able to exchange gases effectively. The alveoli are surrounded by capillaries, which are small blood vessels that transport blood from the heart to the lungs and back again. The capillaries in the lungs are responsible for carrying oxygen-rich blood to the body's tissues, and they also carry carbon dioxide back to the lungs for removal from the body.Another important factor in pulmonary gas exchange is the presence of a concentration gradient. This means that there must be a difference in the concentration of oxygen and carbon dioxide between the alveolar air and the pulmonary capillary blood. This gradient allows for the efficient transfer of gases between the air and the blood.In summary, pulmonary gas exchange is the process of gas exchange that occurs in the lungs between the air and blood. It is a vital process that allows for the delivery of oxygen to the body's tissues and the removal of carbon dioxide from the body.
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First and foremost, science is a(n):
A. unproven theory.
B. way of life.
C. body of knowledge.
D. time in history.
[this is forensic science in criminal justice classes so I don’t know what I would’ve put for the subject sorry)
Answers
Body of knowledge first and foremost, science.
What is science?Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as the old as the human and species, and some of the matter that matter that earliest archeological sample size evidence for scientific reasoning is tens of thousands of thousands of years old.
The first science is body of knowledge
Science is a body of the knowledge, which is built up through experimental testing of ideas. Science is a body of knowledge, which is built up through experimental testing of by the ideas. It is a practical by the way of finding reliable answers to questions we may ask about the world around us.
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Some protists (single-celled organisms) that live in hypotonic pond environments have cell membrane adaptation that slow water uptake. Why does this adaptation make sense?
ALSO please I need help with the other problem
Answers
1. It makes sense that protists in hypotonic pond habitats would have evolved to decrease water intake because a hypotonic environment has more water outside the cell than inside.
As a result, water may enter the cell quickly by osmosis, causing the cell to enlarge and finally explode. Some protists can avoid this and preserve their size and shape by delaying the intake of water.
The adaptation can manifest in a variety of ways, such as the formation of thicker cell membranes that restrict water uptake, the appearance of contractile vacuoles that eliminate extra water, and the synthesis of osmolytes to balance the concentration of water.
The protists can survive in hypotonic settings and preserve their cellular integrity thanks to this adaptation.
3. Since it generates a hypertonic environment around the plant roots, a rise in soil salinity (salt concentration) can be harmful to plants. This indicates that water is forced out of plant cells through osmosis because the concentration of solutes outside the cell is higher than inside. Dehydration and damage to the plant's cells may result from this, which could slow growth and harm the plant as a whole.
4. Pure water cannot be used for IV bags because it is hypotonic in comparison to the different solutes found in human blood. Pure water would quickly infiltrate the patient's cells if injected into their veins, causing them to enlarge and possibly rupture. The solution becomes isotonic to human blood, which means that it has the same concentration of solutes as the blood, by adding solutes like salt or sugar to the IV bag. This guarantees that the patient may get the fluids safely without risking cell harm.
5. The freshwater aquarium's water is hypotonic compared to the fish's body fluids, which means that the concentration of solutes outside the fish is lower than within, hence the saltwater fish cannot thrive there. Osmosis would cause water to travel quickly into the fish's body as a result, leading the fish to quickly absorb too much water and possibly explode. To maintain the correct water balance in their bodies, saltwater fish need a hypertonic environment, whereas freshwater fish need a hypotonic one. Combining the two can be harmful to the fish's health and perhaps kill it.
OsmosisOsmosis is the transfer of water molecules from an area with a higher concentration of water to an area with a lower concentration through a semi-permeable membrane. The amount of solutes (such as salt or sugar) present on each side of the membrane has an impact on the direction and speed of water flow. Water will rush into the cell under hypotonic settings, when the solute concentration is lower outside the cell, causing it to inflate and possibly explode. In contrast, water will exit the cell in hypertonic conditions, when the concentration of solutes is higher outside the cell, causing the cell to contract and possibly die. An increase in soil salinity can be harmful to plants because it makes it difficult for water to penetrate the soil's solute content.learn more about osmosis here
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In chickens, Black feathers (B) are dominant over white feathers (b). Complete the Punnett
Square for the following cross:
Mother: BB
Father: bb
What percentage of offspring will be Black?
What percentage of offspring will be White?
Answers
Answer:
(attached Punnett square below)
100% of the offspring will have black feathers
0% of the offspring will have white feathers
Explanation:
All the possible offspring have the genotype Bb, and since B (black) is dominant it will be the phenotype regardless of the presence of a b allele.
Therefore, all the offspring will be black (100%) and since none of the genotypes are bb there's no chance for white feathered chickens (0%)
hope this helps!
True or false The center of gravity and the center of mass Rae always the same in an object
Answers
Which phrase describes a landform?
a feature of the landscape
the shape of land in an area
a process that shaped Earth's surface
the difference in elevation between the highest and lowest points
Which phrase describes a landform
Answers
Answer:
A) a feature of the landscape
Explanation:
got it right on edge
A landform is the set of forms that stand out on a plane or surface, being a feature of the landscape.
What is a landform?It is an outstanding texture of a surface that has different variations, among the most characteristic reliefs of the earth's surface are mountains, plateaus and plains.
These textures are presented in the form of irregularities and unevenness within a terrestrial or aquatic ecosystem, which provides a feature in a given landscape.
Therefore, we can conclude that a landform is formed by everything that protrudes from a flat surface or that modifies it, that is, it is the set of irregularities or features of a landscape.
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What does mitosis mean in cancer?
Answers
which of the following is an example of convergent evolution? a. the structure of the nervous system in starfish and vertebrates. b. all animals have similar neurons, with voltage-gated sodium channels. c. many bats and dolphins can echolocate, but they evolved from ancestors lacking that ability.
Answers
An example of convergent evolution is many bats and dolphins can echolocate, but they evolved from ancestors lacking that ability.
Thus, the correct option is C.
What is convergent evolution?Convergent evolution is the process by which two species develop similаr feаtures despite not shаring а recent common аncestor. Convergent evolution occurs in аll biologicаl kingdoms, аnd it is pаrticulаrly noticeаble in plаnt species аnd аnimаl species. The only requirement is thаt two species, lаcking а common аncestor, undergo independent evolution thаt results in similаr body forms or similаr useful trаits.
Fish аnd dolphins аre vаstly different аnimаls with different underlying DNА sequences аnd nervous systems. Yet becаuse they inhаbit similаr environmentаl conditions, they hаve developed аnаlogous structures. Birds, bаts, аnd insects аll developed wings viа different evolutionаry pаths.
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Every gene is a sequence of _______ ___________ at a specific position along a chromosome called a ________. Diploid cells have two sets of chromosomes, one set inherited from each parent, that form ______________ __________. The homologs of a chromosome pair contain the same genetic loci. Therefore, each genetic locus is represented _______ in a diploid cell. Variations in inherited characteristics is due to the presence of _______, which are alternative versions of ________.
Answers
Answer: Every gene is a sequence of DNA nucleotides at a specific position along a chromosome called a locus. Diploid cells have two sets of chromosomes, one set inherited from each parent, that form homologous pairs. The homologs of a chromosome pair contain the same genetic loci. Therefore, each genetic locus is represented twice in a diploid cell. Variations in inherited characteristics is due to the presence of alleles, which are alternative versions of genes.
Every gene is a sequence of nucleotide bases at a specific position along a chromosome called a locus. Diploid cells have two sets of chromosomes, one set inherited from each parent, that form homologous pairs. The homologs of a chromosome pair contain the same genetic loci. Therefore, each genetic locus is represented twice in a diploid cell. Variations in inherited characteristics are due to the presence of alleles, which are alternative versions of a gene.
Genes are sections of DNA that contain the blueprints for constructing proteins and other molecules required for the functioning of all living things. Each gene has a defined location along each chromosome, known as a locus. The locus gives the gene a specific address that makes it simple to find and research.
Most creatures, including humans, have two sets of chromosomes, one set inherited from each parent, making them diploid. In a diploid cell, the two sets of chromosomes form homologous pairs, which indicates that they share the same genetic loci. A source of genetic variety, each chromosome in a homologous pair bears a unique allele, or variant, of a gene. One allele, for instance, may be inherited.
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What nutrients, or matter, must pass through the cytoplasm to reach the cell structures that make up a cell?
Answers
Answer:
The correct answer is - amino acid, sugars and fats molecules are major nutrients.
Explanation:
Cell nutrients come in numerous structures, including amino acids, sugars and fats. So as to provide energy to the cell and provide structures, these particles need to go over the cell membrane, which capacities as a barrier that can be pass through different means like endocytosis, diffusion, facilitated diffusion and many more.
plasma membrane is semi-permeable layer which allows specific molecules and substances to pass through the cell and make celular structure and provide energy.
1) bacteria typically have , whereas eukaryotes have . a) one chromosome that is linear; many chromosomes that are circular. b) several chromosomes that are circular; many chromosomes that are linear. c) one chromosome that is circular; many chromosomes that are linear. d) two chromosomes that are circular; eight chromosomes that are linear. e) many chromosomes that are linear; one chromosome that is circular.
Answers
C) is the right option
Bacteria typically have one chromosome that is circular , whereas eukaryotes have many chromosomes that are linear.
Bacterial chromosomes are found in a nucleoid, a distinct cytoplasmic structure that contains double-stranded DNA coated with histone-like proteins. Although most bacteria appear to have a single large circular chromosome, this is not always the case. Bacteria typically have a single circular chromosome that is a few megabases in size. They frequently contain plasmids ranging in size from a few to one hundred or more kilobases. In some cases, the plasmids are as large as chromosomes.
Eukaryotes typically have multiple pairs of linear chromosomes that are all contained in the cellular nucleus and have distinct and changeable forms. They become more tightly packed during cell division, for example, and their condensed form can be seen with a light microscope.
Eukaryotic chromosomes are made up of chromatin, which is made up of two complementary strands of DNA wrapped tightly around histones. The chromatin structure is scaffolded, with three distinct levels. First, the DNA is wrapped around histone clusters to form nucleosomes that are linked by linker DNA.
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Explain How a multicellular organism is a collection of differentiated cells.
Answers
Answer:
the picture is just your answer
Explanation:
read what's on the picture to get your answer
a term used to indicate species or higher level groups, such as genera or families, is:____.
Answers
The answer is: a term used to indicate species or higher level groups, such as genera or families, is Taxon.
in many parts of the united states, some types of tadpoles will change into the adult form (undergo metamorphosis) earlier than usual if the pond where the tadpoles are living starts to dry up. in these drying ponds, food becomes restricted, the water becomes saltier, and the density of the tadpole population increases. the most likely ultimate cause for the early metamorphosis in these tadpoles is the .
Answers
The most likely ultimate cause for the early metamorphosis in the tadpoles is the change in environmental conditions, such as the drying up of the pond, food restriction, increased salinity, and increased population density.
The ultimate cause for the early metamorphosis in tadpoles living in drying ponds is the lack of resources (food and water). When the pond starts to dry up, the amount of water in the pond decreases, resulting in increased salinity. Food also becomes scarce due to the decreased water volume. The increased density of the tadpole population further exacerbates the problem, leading to a lack of resources for the tadpoles. These environmental cues act as a trigger for metamorphosis, which allows the tadpoles to transform into adult frogs earlier than usual.
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The large brains found in humans, which can take up 20% of your energy consumption, can only evolve
Answers
The large brains found in humans, which can consume up to 20% of our energy, have only evolved due to the selective pressures and advantages they provide.
The evolution of larger brains in humans is believed to be driven by factors such as increased cognitive abilities, problem-solving skills, social interactions, and adaptability to diverse environments. The brain's complexity and capabilities have played a crucial role in human survival and success as a species.
However, it's important to note that the evolution of larger brains comes with increased energy demands, requiring efficient energy allocation and management systems in the human body to support their function and maintenance.
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A population of mice occupies a tree stump in a forest. During the last decade, there has been little change in the number of mice in the population. Which of the following would likely cause the number of mice to decrease quickly?
Responses
A a decrease in diseasea decrease in disease
B an increase in predationan increase in predation
C an increase in length of mating seasonan increase in length of mating season
D a decrease in competition
Answers
The most plausible choice that would cause the number of mice to decrease quickly is an increase in predation.
The most likely option that would cause the number of mice to decrease quickly in this scenario is:
An increase in predation.
If the population of predators that prey on mice, such as owls, snakes or other predators, increases significantly, it would put additional pressure on the mouse population.
With more predators hunting and consuming mice, the population would decline at a faster rate.
A decrease in disease would have a different effect.
If there were a decrease in disease, it could potentially lead to improved overall health and survival rates among the mice might result in a stable or even increasing population.
An increase in the length of the mating season would generally lead to more opportunities for reproduction, potentially resulting in an increase in the mouse population rather than a decrease.
A decrease in competition might also result in an increase in the mouse population, as reduced competition for resources would allow for better survival and reproduction rates.
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White blood cells are a part of the body’s defense against infections. Based on the importance of these blood cells, which two systems are involved with fighting infections?
muscular and circulatory
immune and digestive
circulatory and immune
excretory and circulatory
Answers
Explanation:
Immune system and circulatory system
list of some aspects of cell theory is below.
1. All living cells must have a cell wall. 2. All living cells require oxygen for survival. 3. The basic unit of life is a cell
1) Which of these aspects are included in cell theory?
es
A) 1 only
B) 1 and 3
C 2 and 3
D) 3 only
Answers
Answer:
the answer is D
Explanation:
Answer: D
Explanation:
Which of these does NOT greatly affect climate?
A. Earth's Tilt
B. Angle of Sunlight
C. Seasonal Changes
D. Location on Earth
Answers
Answer:
D...
Explanation:
Plz help lol. Identify and describe 2 things that could explain why glucose and complex carbohydates are not disappearing in M’Kenna’s digestive system.
Answers
Answer:
Explanation:
Plz help lol. Identify and describe 2 things that could explain why glucose and complex carbohydates are not disappearing in M’Kenna’s digestive...
What is an allele?
A. Something that is always dominant.
B. A homozgous genotype.
C. One chromosome in pair.
D. A form of a gene.
please help i js need to finish apex lol
Answers
Answer: the answer should be C
Explanation:
the allele can be dominant but in a specific situation. therefore A is not true. and C is basically saying, identical twins. * meaning two identical chromosomes* and i think it should be C because look at the picture. they literally look the same. therefore it should be C * my answer is not complicated and i hoped this helped*
What is the definition of tissue?
Answers
Answer:
any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products
how long after exposure to strep do symptoms appear?
Answers
An individual exposed to group A strep germs typically takes two to five days to become unwell with strep throat.
Till they have taken antibiotics for at least 24 hours, refrain from coming into contact with anyone who has strep throat. Don't exchange personal goods like toothbrushes either. When you cough or sneeze while suffering with strep, be cautious to cover your mouth. People with strep throat might be contagious for up to a few days before they begin to exhibit symptoms, which is unfortunate given how quickly streptococcal germs spread. This implies that a person who is not yet ill can spread the illness.
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After contact to the bacterium, symptoms of strep throat often start to manifest 2 to 5 days later. One to three days following contact to the germs, symptoms of strep throat usually start to manifest.
However, in rare circumstances, symptoms may not start to manifest for up to 5 days. Sore throat, fever, enlarged lymph nodes in the neck, and red, swollen tonsils are the most typical signs of strep throat. Headache, nauseousness, discomfort in the abdomen, and vomiting are possible additional symptoms. Scarlet fever, which can also cause a rash in certain people, is known. It's crucial to keep in mind that not everyone who has strep throat will experience all of these symptoms, and some people may even show no symptoms at all. To avoid problems, it's crucial to get checked out by a doctor if you think you might have strep throat.
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In the following crosses write the characteristics of the progeny
(a) RR YY x RR YY Round, yellow Round, yellow (b) Rr Yy x Rr Yy Round, yellow Round, yellow (c) rr yy x rr yy wrinkled, green wrinkled, green (d) RR YY x rr yy Round, yellow wrinkled green
Answers
(a)Characteristics would be round and yellow seeds. (b) Characteristics would be a 3:1 ratio of round and yellow seeds to wrinkled and green seeds. (c) Characteristics would be wrinkled and green seeds. (d) characteristics would be round and yellow seeds.
What is genotype?Genotype refers to the genetic makeup of an organism.
(a) Given, RR YY x RR YY
All offspring would be homozygous dominant (RR) for seed shape (round) and homozygous dominant (YY) for seed color (yellow).
Phenotype of all offspring would be round, yellow seeds.
Genotype of all offspring would be RR YY.
So, the characteristics of the progeny would be round and yellow seeds.
(b) Given, Rr Yy x Rr Yy
All offspring would be heterozygous (Rr) for seed shape (round) and heterozygous (Yy) for seed color (yellow).
Phenotype would show a ratio of 3:1 for round, yellow seeds to wrinkled, green seeds.
Genotype would show ratio of 1:2:1 for RR YY, Rr Yy, and rr yy, respectively.
So, the characteristics of the progeny would be a 3:1 ratio of round and yellow seeds to wrinkled and green seeds.
(c) rr yy x rr yy
The progeny of this cross would have the following characteristics:
All offspring would be homozygous recessive (rr) for seed shape (wrinkled) and homozygous recessive (yy) for seed color (green).
Phenotype would be wrinkled, green seeds. Genotype would be rr yy.
So, the characteristics of the progeny would be wrinkled and green seeds.
d) Given, RR YY x rr yy
All offspring would be heterozygous (Rr) for seed shape and heterozygous (Yy) for seed color.
Phenotype would be all round, yellow seeds. Genotype would be RR Yy and Rr Yy.
So, the characteristics of the progeny would be round and yellow seeds.
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A child became ill with the measles. Measles is a disease that is highly contagious. The child’s mother did not get sick, even though she and the child were close while the child was ill. The typical response of the human body to an infection by bacteria is to
Answers
The typical response of the human body to an infection by bacteria is to evoke an inflammatory response. The child's mother did not get ill because she, perhaps, developed antibodies for the infection before.
Measles is a disease brought on by a paramyxovirus infection. Viruses are unimportant parasitic microbes. After you become infected, the virus invades host cells and finishes its life cycle by utilizing cellular components.
Measles can be disseminated through the air by both tiny aerosol particles and respiratory droplets. An infected person can cough or sneeze the virus into the air when they cough or sneeze.
These respiratory particles are also able to adhere to objects and surfaces. After touching a contaminated object, such a door handle, you might get sick if you touch your face, nose, or mouth.
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Encaustic is an ancient painting medium in which the pigments are suspended in.
Answers
Answer:
Beeswax is correct
Explanation:
:)
can scientific method be out of order and why
Answers
Answer:
Yes
Explanation:
If the scientist does it wrong, then it can be out of order.
I don’t understand the question
Answers
Red blood cells transfer oxygen into and out of them to maintain homeostasis. Erythrocytes' biconcave form gives them a larger surface area on which to diffuse their cells, hence option A is correct.
How do red blood cells maintain homeostasis?The flexible membrane of the biconcave discocyte RBC has a high surface-to-volume ratio, enabling the RBC to undergo substantial, reversible elastic deformation as it repeatedly passes through tiny capillaries during microcirculation.
RBCs may bend and flow easily through the body's capillaries because of their biconcave shape. It also makes oxygen transfer easier.
Therefore, option A is correct.
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Which of the statements explains why there is an elastic layer found in arteries but not veins?.
Answers
The correct answer is (b) Blood pressure is higher in arteries than veins, and the elastic layer helps maintain the structure of the artery.
Arteries carry oxygenated blood away from the heart under high pressure, while veins carry deoxygenated blood back to the heart under lower pressure. The higher blood pressure in arteries necessitates a stronger and more elastic vessel wall to withstand and maintain the pressure.
The elastic layer in arteries, known as the elastic lamina or elastic fibers, allows the artery to expand and recoil in response to the pulsatile flow of blood, helping to maintain the structure and integrity of the artery.
Veins, on the other hand, have thinner walls and lower blood pressure, so they do not require the same level of elasticity as arteries. Veins rely on valves to prevent backflow of blood and assist with the return of blood to the heart against gravity.
Therefore, the presence of an elastic layer in arteries but not veins is primarily related to the difference in blood pressure and the corresponding need to accommodate and manage the higher pressures in arterial circulation.
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Which of the statements explains why there is an elastic layer found in arteries but not veins?
(a) Arteries are thicker than veins, and the elastic layer is necessary to support the additional weight of arteries.
(b) Blood pressure is higher in arteries than veins, and the elastic layer helps maintain the structure of the artery.
(c) The total length of arteries in the body is more than the total length of veins, and the elastic layer in arteries helps push the blood over the longer length.
(d) Valves present in veins provide a mechanism for withstanding high blood pressure flow going through veins.