attachment example: when stomach cancer becomes metastatic the cancer cells detach from the original tumor and travel solo in the blood to invade other parts of the body. during this process, the extra cellular matrix of the cancer cells also become detached. therefore, you would expect to see in the cell membrane of metastatic stomach cancer cells

Motor units influence the strength of the whole muscle directly whereas the precision of muscle contraction is inversely affected by the size of the motor unit.

A motor unit consists of a motor neuron and the muscle fibers that it activates. The strength of whole muscle contraction is determined by the number of motor units that are activated.

If more motor units are activated, the muscle contraction will be stronger. If fewer motor units are activated, muscle contraction will be weaker. This is known as the size principle, which states that smaller motor units are activated first, followed by larger motor units as more force is needed.

The size of a motor unit influences the precision of muscle contraction (control) by determining the number of muscle fibers that are controlled by a single motor neuron.

Small motor units control a small number of muscle fibers, which allows for fine control and precision. Large motor units control a larger number of muscle fibers, which allows for greater force production but less precision.

Muscles that require fine control, such as those in the fingers and eyes, have small motor units, while muscles that require more force, such as those in the legs and back, have larger motor units.

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Answer:

the tricuspid valve

Explanation:

The tricuspid valve separates the right atrium and right ventricle. The mitral valve separates the left atrium and left ventricle. The pulmonary valve separates the right ventricle and the pulmonary artery

The atomic number consists of only the number of neutrons. Atomic mass also includes the number of protons. Option A.

The atomic number is the number of protons in an atom. On the other hand, the number of neutrons for a particular element can vary. Together, the number of protons and the number of neutrons determine the element's mass number. The main difference between atomic number and mass number is what the atomic number indicates.

Indicates the number of protons present in the atom, and the mass number indicates the total number of protons and the number of neutrons present in the atom. Since atoms are electrically neutral, the number of positively charged protons must equal the number of negatively charged electrons. Since neutrons do not affect the charge, the number of neutrons does not depend on the number of protons and varies even between atoms of the same element.

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Assuming the genes are not linked nor interacting with each other, the expected number of long stemmed plants with purple flowers, producing wrinkled peas, L-P-rr, is 288.

Let us name te alleles as follows

Cross) heter0zyg0us plant is self-crossed

Parental) LlPpRr

Gametes) LPR, LPr, LpR, Lpr, lPR, lPr, lpR, lpr

Assuming that these genes are not linked nor interacting with each other, to make the calcs easier we will make crosses considering each gene separately.

Parental) Ll  x  Ll

F1) 1/4 LL, 2/4 Ll, 1/4 ll

     3/4 long stem, 1/4 short stem

Parental) Pp  x  Pp

F1) 1/4 PP, 2/4 Pp, 1/4 pp

     3/4 purple flowers, 1/4 white flowers

Parental) Rr  x  Rr

F1) 1/4 RR, 2/4 Rr, 1/4 rr

     3/4 round peas, 1/4 wrinkled peas

Now, we will get the proportion of individuals with long stems, purple flowers, producing wrinkled peas, L-P-rr

Note: The symbol - is representing either a dominant or a recessive allele.

From the crosses, we know that

To get the proportion of individuals expressing all these traits together, we just need to multiply these values.

3/4 L- x 3/4 P- x 1/4 rr = 9/64 L-P-rr

Knowing that  the total number of plants is 2,048 and that there are 64 possible gametes combinations from this cross, we will use the proportion 9/64 to get the number of plants with these traits.

64 ------------- 2,048 plants

9 -------------- X = (9 x 2048) / 64 = 288 plants.

We expect to find 288 long stemmed plants with purple flowers, producing wrinkled peas.

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Climate change is a pressing issue that is affecting our planet in numerous ways. The evidence clearly shows that the Earth's climate is changing, and that human activities, such as burning fossil fuels and deforestation, are the primary cause

How these activities release large amounts of greenhouse gases and affects climclimate change?

These activities release large amounts of greenhouse gases into the atmosphere, which trap heat and cause the planet to warm up.

The effects of climate change are already being felt around the world, including rising sea levels, more frequent and severe weather events, and shifts in ecosystems and agricultural productivity. Climate change is also exacerbating social and economic inequalities, particularly for marginalized communities.

We need to encourage individuals and governments to take steps to reduce greenhouse gas emissions and mitigate the effects of climate change. This includes transitioning to clean energy sources, such as solar and wind power, reducing consumption of meat and dairy, supporting policies that prioritize sustainable land use and conservation, and investing in climate resilience measures.

Ultimately, it is up to all of us to take responsibility for our own carbon footprint and make choices that support a sustainable future. We must work together to address the challenges posed by climate change and ensure a livable planet for future generations.

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Answer:B I am very sure

Explanation:

Answer:

I would say A

Explanation:

Because when you add an enzyme it’s lowering the activation energy( which is basically the energy a chemical reaction needs to happen, the energy required to first activate).

So it means since the activation energy was lowered, now the reaction will happen faster and the reaction rate will increase.

Answer:

here you go hope this helps

Explanation:

Answer:

Adhesion and surface tension

Explanation:

Capillary action is the tendency of a liquid to rise or fall in a narrow tube. Two main terms are required to explain capillary action; adhesion and cohesion.

Cohesion is the force of attraction between molecules of the same kind while adhesion is the force of attraction between molecules of different kinds.

Forces of adhesion causes water to move up in a capillary tube. The water is held as it rises by surface tension forces acting on the circumference of the meniscus. The water keeps rising in the tube until the weight of the water drawn up in the tube balances the surface tension acting at the top column of the water.

Answer:

Adenosine diphosphate

Chemical compound Adenosine diphosphate, also known as adenosine pyrophosphate, is an important organic compound in metabolism and is essential to the flow of energy in living cells.

Answer:

ATP (Adenosine tri-phosphate) is an important molecule found in all living things. Think of it as the “energy currency” of the cell. If a cell needs to spend energy to accomplish a task, the ATP molecule splits off one of its three phosphates, becoming ADP (Adenosine di-phosphate) + phosphate.

Explanation:

Sometimes prolonged excessive exposure to high hormone concentrations causes a phenomenon known as downregulation.

Downregulation occurs when a cell is repeatedly exposed to high levels of a particular hormone, causing a decrease in the number of receptors on the cell surface. This reduction in receptors decreases the cell's sensitivity to the hormone and can ultimately lead to a decrease in the cell's response to the hormone.

Downregulation can occur in response to several different hormones, including insulin, thyroid hormone, and cortisol. The phenomenon is often observed in cases of hormone therapy, where high doses of a hormone are given to individuals who have low levels of the hormone naturally. In such cases, the body may respond by downregulating the number of receptors to protect itself from excessive hormone exposure.

Overall, downregulation can have significant implications for hormone signaling and may impact an individual's response to hormone therapy or hormone-related diseases.

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The respiratory membrane, across which gases diffuse, is very thin and is made up of C) alveolar cell membrane and capillary membrane.

The respiratory membrane is the site of gas exchange between the air in the alveoli and the blood in the pulmonary capillaries. It consists of the thin walls of the alveoli and the pulmonary capillaries. The alveolar wall is composed of two main layers: the alveolar epithelium and the capillary endothelium. These two layers are separated by a thin interstitial space, which contains a thin basement membrane.

The diffusion of oxygen and carbon dioxide occurs across the alveolar cell membrane and the capillary membrane, which are composed of phospholipid bilayers and associated proteins.

Therefore, the correct answer is C) alveolar cell membrane and capillary membrane.

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Answer:

Coronary arteries is the answer .

Answer:

The answer is false

Explanation:

Answer:

Answer is C

Explanation:

our bodies clotting is a positive feedback loop

Answer:

D

Explanation:

i took the test

The base and sugar between DNA nucleotides are linked by hydrogen bonds. Option c.

DNA stands for Deoxyribonucleic acid which is a long molecule that carries genetic information and is found in the nucleus of a cell. It is composed of nucleotides that are linked together. Each nucleotide is composed of three components; a nitrogenous base, a sugar (deoxyribose), and a phosphate group. The base is attached to the sugar and the sugar is attached to the phosphate group.Hydrogen bonds are weak bonds that exist between a hydrogen atom of one molecule and the oxygen or nitrogen atom of another molecule. They occur when a hydrogen atom is covalently bonded to an electronegative atom and is also attracted to another electronegative atom. In DNA, the hydrogen bonds exist between the nitrogenous bases of nucleotides. There are four types of nitrogenous bases found in DNA; adenine (A), thymine (T), guanine (G), and cytosine (C). Adenine always pairs with thymine through two hydrogen bonds and guanine always pairs with cytosine through three hydrogen bonds. These hydrogen bonds hold the two strands of the double helix structure together.

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Answer:

resources are unlimited

Explanation:

Answer:

A

Explanation:

polygenic inheritance

Answer:

the first one i think hope this helps

Explanation:

Together, the CNS and PNS transmit messages throughout your body that instruct you to do essential functions, such as breath, move, see, smell, and think. The nervous system performs these additional functions:

Controlling heart rate

Releasing hormones

Regulating digestion

Protecting neurons and neurotransmitters

Influencing behavior and emotions

hope i helped

Answer:

I think so

Explanation:

Answer:no

Explanation: the 1st 4th 5th and 6th is wrong

Answer:

1. Light energy.

2. Heat energy.

3. Kinetic energy.

4. Potential energy.

5. Chemical energy.

Hope this helps!

Answer:

Predation

Explanation:

Predation is the interaction where one organism, the predator (red-tailed hawk), kills and eats another organism, its prey (praire dog).

It is not the other three because:

Prey evasion is when the prey attempts to avoid its predator; however, in this case, the prairie dog is being eaten by the red-tailed hawk.

Interspecific competition is when individuals of different species compete for the same resources in an ecosystem.

Herbivory is the consumption of plant material by animals, and herbivores are animals adapted to eat plants. There are no plants being involved in this scenario.

The statement that is most likely true of the cuticle in plant species lacking pores is that it is impermeable to water and gases.

The cuticle is a waxy, waterproof layer on the surface of plants, including leaves, stems, and fruits. The cuticle serves as a barrier, protecting plants from water loss, disease, and injury, as well as UV radiation and insect attack.Plant species lacking poresMost plants have stomata, tiny openings in the leaves that allow for gas exchange with the environment. However, some plants, such as the water lily, lack stomata and rely solely on diffusion through the cuticle for gas exchange.

As a result, the cuticle of these plants must be highly impermeable to prevent water loss and maintain the proper balance of gases within the plant tissues. Thus, the statement that is most likely true of the cuticle in plant species lacking pores is that it is impermeable to water and gases.

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Answer:

b

Explanation:

shallow focus with 3.5 magnitude would be very big because its shallow.

The majority of the energy is converted to heat during this process when the waste and dead matter are broken down by decomposers and the nutrients are recycled into the soil to be taken up again by plants. Only 10% of the energy accumulated as biomass in a trophic level is typically transferred to the next level.

An ecosystem is a place where plants, animals, and other species interact with the environment—including the climate, the topography, and other elements—to form a bubble of life. In ecosystems, biotic and abiotic factors—or nonliving components—coexist. Biotic factors include plants, animals, and other species.

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Answer:

67%

Explanation:

When taking random samples from a population, the observed numbers are not always as the expected ones. The difference is by chance, instead of 50% heter0zyg0us, the sample included 67%.  

--------------------------

Available data:

-  Moths' color ⇒ diallelic gene

- f(G) 1960 = 0.8

- f(G) 1965 = 0.7

- f(G) 1970 = 0.6

- f(G) 1975 and 1980 = 0.5

-  1980 ⇒ N = 2000 pupae

-  Population in H-W equilibrium

Hardy-Weinberr equilibrium,  

In this problem we assume that the population is under H-W equilibrium, and we know that p = 0.5.

Considering that p + q = 1, then by clearing the equation, we get the value of q = 0.5    

Finally, we know that the genotypic frequency of the heter0zygous genotype is 2pq, so,

F(Gg) = 2pq = 2 x 0.5 x 0.5 = 0.5 = 50%

Now, among the options in the problem, there is not 50% but others. One of them, and the closest to 50%, is 67%.

The chart reflects that through the years, the moth's populations stabilized. Both alleles were favored, and their frequencies got to be equal to each other -0.5-. So there is a high probability of getting heter0zyg0us individuals in the population -50%-, more than any of the h0mzyg0us ones -25%-.  

However, in a natural population, the amount of h0m0zyg0us and heter0zygous individuals observed is not always the same as the expected ones. This fact happens especially when there are random samples.

In this experiment, the researcher took 2000 pupae, but they did not know their genotype. They just took them randomly. Even though the population is in H-W equilibrium, when sampling, the researcher took more heter0zyg0us individuals than the expected ones. It does not mean that the population is not under H-W equilibrium. It just means that by chance, more heter0zyg0us were selected.

So what you need to do in these situations, is to analyze your problem and the provided information, and think about the most feasible answer.

In this case, the expected number is 50% heter0zyg0us. The closest option is 67% and the most feasible. So that would be the answer.

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Answer:

The epigenome is made up of chemical compounds and proteins that can attach to DNA and direct such actions as turning genes on or off, controlling the production of proteins in particular cells.

Explanation:

Hope this helps pls give thanks or brainliest

Answer:

The epigenome is made up of chemical compounds and proteins, or chemical tags, that can bind to DNA and direct actions such as turning genes on or off, and controlling protein production in specific cells.

Explanation:

Answer:

The correct answer is - closely related species.

Explanation:

If two species have similar gene sequences or nucleotide sequences with the same base pairs then it means they both are closely related and have diverged from a similar and latest ancestor.

The same gene sequence results in the same proteins that could result in the same phenotypic behavior. Such cases establish that both species are closely related and have recently diverged. These species must have a common ancestor.