What is the term we use to describe the cell membrane based on how it lets things into and out of the cell??

Answers

Answer 1

Answer: Scientists use what is called the Fluid Mosaic Model to describe the cell membrane's structure and function.

Explanation:

The cell membrane is selectively permeable, or "semi-permeable", meaning that the membrane only allows certain substances to enter or leave the cell.


Related Questions

What is the energy source that allows photosynthesis to occur?

Answers

Answer:

\(\boxed {\boxed {\sf The \ sun }}\)

Explanation:

Photosynthesis is a special process that certain organisms (plants, algae, and some bacteria) undergo to create "food".

This turns light energy, carbon dioxide, and water into glucose and oxygen. The glucose becomes the food for the organism, because it is turned into ATP during cellular respiration. The ATP is energy that fuels the processes, like growth, repair, and transport.

This process occurs because of the sun. It provides the light energy needed for the reaction. Organelles inside of the cells, called chloroplasts, contain a pigment (chlorophyll) that captures this energy.

Domestic cats can begin reproducing as young as six months of age. Each female cat can produce two litters per year, containing multiple cats that can also begin reproducing early. What prediction can you make about an ecosystem in which cat populations are not controlled? Within a few years, the population of cats would increase slowly. Within a few years, there would be many starving cats. Rats and other small animals would initially suffer, but then quickly develop survival skills. A predator for the cats would rapidly appear to match the population growth.

Answers

If cat populations are not controlled in an ecosystem, the prediction that can be made is within a few years, there would be many starving cats. Therefore, the correct option is B.

What is ecosystem?

An ecosystem can be defined as a biological community where biotic as well as the abiotic factors of the environment interact.

In the problem given here, if cat populations are not controlled in an ecosystem, the prediction can be that within a few years, there would be many starving cats. This is because domestic cats can reproduce quickly and produce multiple litters per year.

This can result in an exponential increase in the cat population over time, due to which the available resources such as food and shelter will become limited. This can lead to competition for resources among the cats, which can result in starvation and malnutrition. Therefore, the correct option is B.

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The question is incomplete, but most probably the complete question is,

Domestic cats can begin reproducing as young as six months of age. Each female cat can produce two litters per year, containing multiple cats that can also begin reproducing early. What prediction can you make about an ecosystem in which cat populations are not controlled?

A. Within a few years, the population of cats would increase slowly.

B. Within a few years, there would be many starving cats.

C. Rats and other small animals would initially suffer, but then quickly develop survival skills.

D. A predator for the cats would rapidly appear to match the population growth.

connective tissue structures that attach bone to muscle are called

Answers

Answer:

those connective tissues are called Tendons.

Explanation:

A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. tendons are often confused with ligaments, ligaments are fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable

consensus paper: roles of the cerebellum in motor control— the diversity of ideas on cerebellar involvement in movement

Answers

The consensus paper on the roles of the cerebellum in motor control highlights the diversity of ideas regarding the involvement of the cerebellum in movement. It acknowledges that there are varying perspectives and theories regarding the specific functions of the cerebellum in motor control.

The cerebellum has long been recognized as a key structure involved in motor control, but there is still ongoing debate and diversity of ideas among researchers regarding its precise roles and functions. The consensus paper aims to provide an overview of the different perspectives and theories on cerebellar involvement in movement.

Some theories propose that the cerebellum primarily serves as a coordinator of motor commands, ensuring the smooth execution and coordination of movements. Others suggest that it plays a role in motor learning, error correction, and fine-tuning of movements. There are also theories proposing the cerebellum's involvement in predicting and anticipating movements.

The paper may discuss experimental evidence supporting different viewpoints, as well as areas of consensus or ongoing research. By acknowledging the diversity of ideas, the consensus paper promotes further exploration and collaboration among researchers, leading to a deeper understanding of the cerebellum's complex contributions to motor control.

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What is the definition of wavelength​

Answers

Answer:

The wavelength is the distance between 2 crests or troughs

(crests and troughs are the maximum upwards and downwards displacement from the equilibrium). Another way to phrase this is the length of one complete wave cycle.

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A class of diseases in humans known as oxidative phosphorylation (aerobic respiration) disorders makes people feel very low in energy and to have diminished function of nerve and muscle cells, the two most energy-intensive cell types of the body. The organelle most likely to be defective in oxidative phosphorylation (aerobic respiration) disorders is the

Answers

The organelle most likely to be defective in oxidative phosphorylation (aerobic respiration) disorders is the mitochondrian .

A mitochondrion is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate, which is used throughout the cell as a source of chemical energy.

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

the power plants in virtually every human cell (as well as animal, plant, and fungi cells), mitochondria play an essential role in creating energy to drive cellular function and basically all of our biological processes.

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A class of diseases in humans known as oxidative phosphorylation (aerobic respiration) disorders makes

the sequence of bases in a dna strand can make up a __ that can confer a given trait on an organism.

Answers

Answer:

the sequence of bases in a dna strand can make up a gene that can confer a given trait on an organism.

Explanation:

Hope it will help

A gene defines the genetic traits of each organism, this being the sequence of bases in a portion of DNA that contains the information necessary for protein synthesis.

What is a gene?

It is the DNA sequence that is constituted as a functional unit in charge of the transfer of hereditary traits, being essential that the functional RNA can be synthesized.

This can confer a given trait on an organism and preserves genetic data, it is in charge of transmitting the inheritance to the descendants.

Therefore, we can conclude that a gene defines the genetic traits of each organism, this being the sequence of bases in a portion of DNA that contains the information necessary for protein synthesis.

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You are standing close to a tall tree when you suddenly see lightning and hear thunder. Should you take shelter under the tree, run across the field to the nearest building, or do something else? Explain why

Answers

Answer:

You should never take shelter under a tree when lightening. You should get away from the tree and get as low down to the ground as possible. You do not always have enough time to get to a building so it depends on your surroundings/situation.

Explanation:

Hope this helps!

why the plant obtains phosphorus and micronutrients from this beneficial symbiotic relationship?

Answers

Plants require nitrogen to produce a lot of leaves and a vibrant green colour. Plants use phosphorus to create new roots, seeds, fruit, and blooms. It is also used by plants to fight illness.

What advantages do micronutrients provide for plants?

Micronutrients encourage crops to grow vigorously and steadily, which boosts yields and improves the quality of the harvest while optimising a plant's genetic potential. Their presence can have a significant effect on a variety of plant processes, including root development, fruit setting and grain filling, seed viability, and plant vigour and health.

How do plants get the nutrients phosphorous and nitrogen?

The plant absorbs nitrogen, phosphate, and other minerals from the soil by mycorrhization, including zinc and copper. The fungus draws these nutrients from rotting matter.

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ecology
Define the term metapopulation. (a) what are the factors that characterize metapopulations, and what conditons need to be satisfied in order for metapopulations to persist? be thorough in answering

Answers

Metapopulation is defined as a group of geographically distributed subpopulations, connected by intermittent migration and dispersion. They are characterized by migration, local extinction, and recolonization.

The factors that characterize metapopulations include the following:

The size of the subpopulations: The size of each subpopulation can be different. They can range from a few individuals to thousands.

The connectivity of the subpopulations: The subpopulations in a metapopulation can be connected by dispersal or migration.

The dynamics of local extinction: In metapopulations, the extinction of a local subpopulation can occur due to various environmental factors. This factor creates a vacant patch that can be recolonized by the dispersing individuals.

The dynamics of colonization: The colonization of vacant patches can occur by individuals from a neighboring subpopulation through migration, and this is a dynamic that characterizes metapopulations.

The conditions that need to be satisfied for metapopulations to persist are:

The subpopulations in a metapopulation must remain connected through the migration of individuals, and the rate of immigration must be greater than the rate of local extinction.

The extinction of a local subpopulation must not occur too frequently because it can lead to the extinction of the entire metapopulation if the rate of extinction is too high.

The size of each subpopulation must be large enough to avoid the effects of genetic drift and other factors that can increase the rate of extinction of a subpopulation.

Overall, metapopulation persistence requires the maintenance of a balance between the rate of extinction and recolonization. In addition, the size and connectivity of subpopulations must be carefully maintained to ensure the persistence of the metapopulation.

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fertilization of the ovum most often occurs in the:

Answers

fertilization of the ovum most often occurs in the fallopian tubes.

fertilization is the process of the fusion of a sperm cell and an egg cell, resulting in the formation of a zygote. In humans, fertilization most often occurs in the fallopian tubes, also known as the oviducts. The fallopian tubes are a pair of narrow tubes that connect the ovaries to the uterus.

After ovulation, which is the release of an egg from the ovary, the egg travels through the fallopian tube. If sexual intercourse has occurred and sperm cells are present in the fallopian tube, one of the sperm cells may successfully penetrate the egg, leading to fertilization.

Once fertilization occurs, the resulting zygote begins to divide and develop as it moves towards the uterus. The journey from the fallopian tube to the uterus takes several days. If the zygote successfully reaches the uterus, it may implant into the uterine lining and continue its development as an embryo.

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Fertilization of the ovum most often occurs in the fallopian tubes, also known as the uterine tubes.

Fertilization of the ovum, or the union of a sperm cell and an egg cell, typically occurs in the fallopian tubes of the female reproductive system. Here is some additional information:

1. Location: The fallopian tubes are a pair of slender, tube-like structures that extend from the uterus (womb) to the ovaries. Each tube is approximately 10-12 centimeters long and has finger-like projections called fimbriae at the end closest to the ovary.

2. Journey of the Egg: During ovulation, an egg is released from one of the ovaries and enters the fallopian tube. The egg is then carried through the tube by the movement of tiny hair-like structures called cilia and muscular contractions of the tube walls.

3. Meeting of Sperm and Egg: If sexual intercourse occurs around the time of ovulation, sperm cells can enter the fallopian tube through the cervix and make their way towards the egg. Fertilization typically takes place in the ampulla, which is the widest part of the fallopian tube located closer to the ovary.

4. Fertilization Process: Fertilization occurs when a sperm cell successfully penetrates the outer layer of the egg, called the zona pellucida, and fuses with the egg's nucleus. This fusion combines the genetic material of the sperm and the egg, forming a fertilized egg or zygote.

5. Journey to the Uterus: After fertilization, the newly formed zygote undergoes a series of cell divisions while it continues to travel down the fallopian tube towards the uterus. This journey takes several days.

6. Implantation: Once the zygote reaches the uterus, it will eventually implant itself into the uterine lining, initiating pregnancy.

It is important to note that while fertilization usually occurs in the fallopian tubes, in rare cases, it can happen in other locations, such as the cervix or the abdominal cavity. However, the fallopian tubes are the primary site for the natural process of fertilization in the female reproductive system.

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According to Darwin's theory of natural selection, which of the following describes the individuals that tend to survive?
a.those that can change themselves to fit their environment
c.those that produces the fewest offspring
b.those that are the largest and produce the most offspring
d.those that have the variation best suited to their environment

Answers

Answer:

D

Explanation:

Darwin believed that the species with the best variation to their environment had the biggest chance at surviving.

Darwin believed that the species with the best variation to their environment had the biggest chance at surviving.

What is Natural selection?

The process by which species adjust to their habitats is known as natural selection. It is the force behind evolution.

The process through which populations of living things adapt and change is known as natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways.

This variety indicates that some people have characteristics that are more environment-appropriate than others. People that possess advantageous qualities, or adapted traits, are more likely to live and procreate.

Therefore, Darwin believed that the species with the best variation to their environment had the biggest chance at surviving.

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Need help pls brainless to. Who ever helps

Need help pls brainless to. Who ever helps

Answers

i can help you out.

What are structures composed of more than one type of tissue, working together on a specific bodily function?

Answers

The answer is organs

where does translation occur in a cell

Answers

Answer:

Ribosomes located in the cytoplasm

Explanation:

Translation is the second process involved in protein synthesis. It is the process whereby protein is synthesized from an mRNA molecule. Initially, the information contained in the DNA molecule is transcribed into RNA molecule in the nucleus of eukaryotic cells.

The mRNA molecule then leaves the nucleus and attaches to a complex of RNA and protein called RIBOSOME, which is found floating freely in the cytoplasm or attached to Endoplasmic Reticulum. The Ribosome is an organnelle regarded to be the site of protein synthesis.

Hence, translation starts when the mRNA molecule attaches to the Ribosome in the cytosol of the cell.

A cell's cytoplasm is where translation takes place, specifically on ribosomes. Cellular organelles called ribosomes are in charge of protein production. In eukaryotic cells, they can be found either free in the cytoplasm or bound to the endoplasmic reticulum (ER).

The messenger RNA (mRNA) molecules that carry the genetic code from DNA are read by the ribosomes during translation to create proteins. The procedure entails translating the mRNA sequence into a certain amino acid sequence, which creates the basic framework of a protein.

Codons are collections of three nucleotides that the ribosomes use to read the mRNA. Each codon is associated with either a particular amino acid or a stop signal.

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How can scientific conclusions be reliable, but also able to be changed with the introduction of new evidence

Answers

Answer:

scientific conclusions are reliable as they are helpful for many things however it is true that after the evolution of new ideas the old theory have some changes or may change fully or may be proved wrong but yeah the old theories are still helpful for many reasons and things.

so I think scientific conclusions are reliable

Worth all the points I have- Can anyone help me on this. My teacher told me I did it completely wrong :( I really need help ASAP

Worth all the points I have- Can anyone help me on this. My teacher told me I did it completely wrong

Answers

Answer:

if you f her she will let you get straight A+

Explanation:

ik becuase ive done it

Need help with Biology question

Need help with Biology question

Answers

The given forms of digestion represent hydrolysis.

What is hydrolysis?

Hydrolysis: A chemical decomposition process in which bonds are broken by the addition of water. Hydrolysis reactions break bonds and release energy. Biopolymers are ingested and hydrolyzed in the gastrointestinal tract to form small molecules that can be absorbed by cells and further broken down to release energy.

Sucrose is hydrolyzed into its monosaccharides fructose and glucose by the enzyme sucrase, an α-glucosidase in the human small intestine.Hydrolysis of lactose gives galactose and glucose. Galactose is converted to glucose by the action of an NAD-dependent enzyme called UDP-galactose-4-epimerase.Starch is a condensation polymer of glucose monomer units. Large starch molecules react with water and break down into smaller sugar molecules. The starch is said to be hydrolyzed.

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Resources that humans have thanks to biodiversity are:

A.Textiles
B. Wood products
C. Compounds used in medicines
D. all of the above.

Answers

Answer:

D. tất cả các ý trên

Explanation:

Birds use specific songs, coloring, and mating dances to attract mates of their species. This is an example of _____ reproductive isolation.

Answers

Answer:

prezygotic.

Explanation:

In Ecology, when birds use specific songs, coloring, and mating dances to attract mates of their species. This is an example of prezygotic reproductive isolation.

17. Epithelium exhibits many plasma membrane modifications. Figure 3-7 depicts
some of these modifications.
First: Choose a color for the coding circles and the corresponding structures
in the figure.
O Epithelial cell cytoplasm
Epithelial cell nucleus
Nerve fibers
Connective tissue
Blood vessel

Answers

Can u send the picture

Question 3 of 10 What does the Kyoto Protocol aim to reduce? A. UV radiation B. Ozone content C. CFC use D. CO₂ emissions SUBMIT ​

Answers

The Kyoto Protocol aims to reduce D. CO₂ emissions. The Protocol has been ratified by 192 countries.

What is the Kyoto Protocol about?

The Kyoto Protocol is an international agreement that was adopted in Kyoto, Japan, in 1997. The Protocol commits its Parties by setting internationally binding emission reduction targets. The Kyoto Protocol's first commitment period started in 2008 and ended in 2012.

The Protocol's second commitment period began on January 1st, 2013 and will end in 2020. The Kyoto Protocol is an important step in the fight against climate change. It is the first international agreement that sets binding targets for reducing greenhouse gas emissions.  

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PLEASE HELP. Why is the Krebs cycle so important if it only produces 2 ATP molecules?
a) It produces reducing agents for the electron transport chain
b) It oxidizes pyruvate and prepares it for the electron transport chain
c) It uses all the glucose we eat
d) It produces many CO2 molecules

Answers

Answer:

A- It produces reducing  agents  for the electron transport chain

Explanation:

Water is an excellent solvent mainly because:
A.it can dissolve other substances
B.water molecules are uncharged
C.it is a liquid
D.objects can float in it

Answers

Answer:

Water is said to be a universal solvent because it can dissolve many other substances ( than other solvents)

Part A: Explain how Enzyme A acts as a catalyst in the reaction Be sure to include energy and time in your response.






Part B: Conditions around an enzyme change and affect the shape of the enzyme’s active site. Predict how this would affect the enzyme’s ability to catalyze (speed-up) the reaction.

Part A: Explain how Enzyme A acts as a catalyst in the reaction Be sure to include energy and time in

Answers

Answer:

A) Enzymes and chemical catalysts both affect the rate but not the equilibrium constant of a chemical reaction. Reactions proceed downhill energetically, in accord with the Second Law of Thermodynamics. Catalysts merely reduce the time that a thermodynamically favored reaction requires to reach equilibrium. Remember that the Second Law of Thermodynamics tells whether a reaction can occur but not how fast it occurs.

Enviromental quality refers to the quality of the total enviroment, including both the natural and the __ enviroment ?

Answers

Answer:

Environmental quality refers to the quality of the total environment, including both the natural and the built environment.

Natural Environment- Plants, animals, natural resources, etc.

Built Environment- Man-made structures and facilities.

Let me know if this helps!

What is it called when protein synthesis occurs and mRNA is used as a template to build a protein?

Answers

Protein synthesis is the process by which cells use genetic information to build proteins. The process of protein synthesis is often divided into two stages: transcription and translation.

During transcription, genetic information is transcribed from DNA to a molecule called messenger RNA (mRNA). During translation, the information in the mRNA is used as a template to build a protein. This process of using mRNA as a template to build a protein is called translation.Translation begins when the mRNA molecule leaves the nucleus and enters the cytoplasm of the cell. In the cytoplasm, the mRNA molecule binds to a ribosome, a cellular structure responsible for protein synthesis.

The ribosome reads the sequence of nucleotides in the mRNA, and matches them to the corresponding amino acids. This is done with the help of transfer RNA (tRNA), which brings the correct amino acids to the ribosome.The ribosome moves along the mRNA, adding amino acids to the growing protein chain. The peptide bonds between the amino acids are formed by enzymes within the ribosome, and the protein is continuously elongated until the ribosome reaches a stop codon on the mRNA. At this point, the protein is complete and is released from the ribosome.

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Please help me with this, question

Please help me with this, question

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Based on the given information, I cannot directly observe where the new gene was inserted in each of the corn calluses genomes as the genome sequence information is not available.

However, the prompt suggests that problems can occur if the new gene is inserted into the middle of an existing corn gene (green bar). Therefore, I will choose the corn callus in which the new gene was not inserted inside an existing corn gene.

It is crucial to avoid disrupting existing genes as it can lead to unwanted effects on the plant's growth, development, and function. The callus in which the new gene was inserted without disrupting an existing corn gene will be the one with the highest likelihood of producing a healthy and functional plant. The successful integration of the new gene into the plant's genome can lead to the expression of the desired trait, such as resistance to a particular disease or environmental stress, without causing any detrimental effects on the plant's overall health and productivity.

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name the process of conversion of wood into coal​

Answers

Answer:

Carbonization is the term for the conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis or destructive distillation. It is often used in organic chemistry with reference to the generation of coal gas and coal tar from raw coal.

Which three factors most directly affect surface currents in the oceans?
A.
surface winds, the Coriolis effect, and continental deflection
B.
upwelling, convection, and the sun's energy
C.
dissolved solids, dissolved gases, and the sun's energy
D.
deep currents, convection currents, and surface winds

Answers

Answer:

A.

surface winds, the Coriolis effect, and continental deflection

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