what useful purpose is served by cell division in a multicellular organism : select all the correct answers.
A: to ensure that a cell does not become to large
B; To produce new cells during an organisms growth
C: To replace damaged cells and tissues
D: to ensure all cells remain undifferentiated

Answer:

Myelinated axons utilize fewer voltage-gated channels than unmyelinated axons of the same length and diameter.

Myelinated axons are more energy efficient than unmyelinated axons.

Explanation:

Neurons are cells that specialize in transmitting messages to each other using a type of electrical signal. These signals carry information from outside your body to the brain, while others are the instructions for the various organs, glands and muscles to carry out functions.

Neurons receive these signals from other neighboring neurons through their dendrites. The signal then travels to the soma of the neuron, which is the main body of the cell, and finally travels down the axon to the synapse (space between the end of a neuron and another cell). The axon is a neuronal extension through which the electrical signal travels, extending from the soma to other neurons.

There may be layers of myelin, which consist of a layer of fat, covering the axons and where they have the function of acting as insulators to help keep the electrical signal inside the cell, which makes it move faster increasing the speed of transmission of the nerve impulse.

1) Myelinated axons transmit nerve impulses via continuous conduction. FALSE. In the axon, nodes of Ranvier are found at regular intervals along the length of the axon in the myelin sheath that surrounds it. These are small spaces that expose the axon membrane to the extracellular fluid and serve to allow the nerve impulse to travel faster, in a jumping manner and with less chance of error.

2) Myelinated axons transmit nerve impulses in the same manner as unmyelinated axons. FALSE. In an unmyelinated axon, the movement of voltage across the membrane is due to ion flux that is limited by the time it takes for sodium ions to diffuse into the axon. Myelinated axons conduct faster because they are shorter than unmyelinated axons. In the latter, transmission is continuous but slower.

3) Myelinated axons utilize fewer voltage-gated channels than unmyelinated axons of the same length and diameter. TRUE. The action potential conduction jumps from node to node, thereby they need fewer voltage-gated channels. Unmyelinated axons need voltage-gated channels in along the entire axon.

4) Myelinated axons are more energy efficient than unmyelinated axons. TRUE. The rate at which sodium input through one node can depolarize the axon at the next node is related to the current and capacitance across the membrane. Myelinated axons have faster action potential conduction because it jumps from node to node, thereby they use less energy because they don't have to travel the entire length.

5) Myelinated axons would be unaffected by diseases that attack the CNS. FALSE. For example, Multiple sclerosis (MS) is a demyelinating disease of the CNS in which the immune system attacks the myelin sheath or the cells.

The correct statements are:

Myelinated axons are nerve fibers that are protected by a covering called myelin. In both the central nervous system (CNS) and peripheral nervous system (PNS), oligodendrocytes and specialized cells known as Schwann cells work together to generate the myelin sheath. This sheath is composed of several layers of lipids, which are fatty substances that wrap around the axon in segments, leaving small spaces known as nodes of Ranvier.

Therefore, the correct options are A, C and D.

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Your question is incomplete, most probably the complete question is:

Check all that apply as characteristics of myelinated axons. Check All That Apply

Answer:

D. glucose + oxygen ⇒ water + energy + carbon dioxide

Explanation:

The reactants of cellular respiration, or the substances that are used for the beginning of the chemical process, are sugar (glucose) and oxygen. The products, or the results of cellular respiration, are water, carbon dioxide, and ATP energy. Thus, D is the answer.

The general equation for cellular respiration is glucose + oxygen --> water + energy + carbon dioxide, which is in option D. So, here, the correct answer is option D.

Glucose is a sugar molecule that serves as the primary source of energy for cells. It is derived from the breakdown of carbohydrates in the diet or can be produced through other metabolic processes. Oxygen is required for cellular respiration as the final electron acceptor in the electron transport chain. It is obtained from the air through breathing or from other sources in organisms that do not respire aerobically. During cellular respiration, glucose and oxygen undergo a series of metabolic reactions in different stages, including glycolysis, the citric acid cycle, and oxidative phosphorylation. The correct option is option D.

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Answer:

an adaptation can be defined as an inherited trait which confers an evolutionary advantage to the organism in a certain environment

Explanation:

An adaptation, also known as an evolutionary adaptation, can be defined as any physiological and/or morphological inherited trait related to the improved evolutionary fitness of one organism in a particular environment. An adaptation improves the chances of survival and reproduction in a certain environment, thereby organisms carrying the adaptation have more chances to produce descendants and pass their genes to the next generation. Some classical examples of evolutionary adaptations include the long necks of giraffes that help them to eat leaves at the top of trees, light bones of flying birds, etc.

Answer:

I dont have an answer but what is the actual answer

Explanation:Confused (NO ANSWER)

They will look the same because the plants grown from seeds are genetically identical to one another but not to the mother plant. So, the correct option is (A).

Fertilization is defined as the process of sexual reproduction, which occurs after pollination and germination which can be defined as the fusion of male gametes called pollen with female gametes called as ovum to form diploid zygote. It is a physio-chemical process that occurs after pollination of the carpel.

Steps of Fertilization occur in Plants

1. Pollination

2. Germination

3. Fertilization

Fertilization occurs through the pollen tube opening into the ovule through the micropyle and bursting into the embryo sac where the male nucleus fuses with an egg nucleus inside the ovule to form a diploid zygote, which then swells and develops into a fruit. These plants are similar in appearance when grown from seed but with the tuber method they will appear identical but not with the mother.

Thus, they will look the same because the plants grown from seeds are genetically identical to one another but not to the mother plant. So, the correct option is (A).

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Answer:

True

Explanation:

This is because when you move across the periodic table, the number of atoms increase and the number of energy decrease downward. N represent energy level . n1 is the closest in the nucleus and n7 is the farthest. The farther the n in the nucleus, the higher the energy in the orbital. The smaller the n, the lower the energy and closer to the orbital.

Answer:increase the mass of the box

Explanation:

Big brain

Answer:

they purify water in the hydrosphere

Microbes are beneficial as well as detrimental to the environment. They do not purify water in the hydrosphere instead pollute them. Option (A) is correct.

The quantity and variety of native microorganisms in an aquatic environment have a significant impact on water quality .

Physical, biological, and chemical contaminants from human activity can build up in aquatic systems and have significant ecological effects that can be detrimental in nature.

Microbial activity in the aquifer may have an impact on a number of ground-water quality indices, including pH, oxidation/reduction (redox) status, dissolved oxygen, or the presence of certain mineral components. This is especially true if there are elements in the aquifer that bacteria may use to flourish.

Therefore, option (A) is correct option.

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Answer:

Emigration

Explanation:

If there is a large number of deaths, then the population would move onto another area to find a mate, more food, and to be together to protect themselves from danger.

Hope this is what you were looking for, lmk if I can do anything else.  

Answer:

The binding of carbon monoxide (CO) with hemoglobin leads to an R state even in conditions that should produce the release of oxygen. In consequence, CO-hemoglobin binding shifts the oxygen dissociation curve to the left.

Explanation:

Hemoglobin is a globular protein containing four heme groups that can bind to one oxygen each. This protein (hemoglobin) has two conformational states: the T-state, also known as deoxyhemoglobin (a tense state, where lacks O species), and the R-state, also known as oxyhemoglobin (a relaxed, fully oxygenated state). When carbon monoxide binds to hemoglobin, the protein can not release oxygen, shifting the oxygen dissociation curve -which expresses the percentage of oxygen saturation against the partial pressure of oxygen- to the left. Therefore, under CO-hemoglobin binding, the oxygen level in the tissues is reduced.

In most species of frogs, fertilization is external. The male frog grabs the female's back and fertilizes the eggs as the female frog releases them. The sperm and egg die quickly unless fertilization occurs.

Answer:

correct order of the cell cycle? A

Answer:

D

Explanation:

All of the other options go against actual facts and the laws of biology

Answer:

Narcissistic Love

Explanation:

Answer: narcisism is the only one that makes sense

Explanation:

Answer:

c

Explanation:

All the others would begin to kill off a population

Answer:

The sulfur cycle describes the movement of sulfur through the geosphere and biosphere. Sulfur is released from rocks through weathering, and then assimilated by microbes and plants. It is then passed up the food chain and assimilated by plants and animals, and released when they decompose.

Answer:

Subsidence

Explanation:

subsidence is a process where cold temperatures in the polar regions cause air to descend to create high pressure it's basically the difference in temperatures that make the pressure so high because hot atoms expand and becomes less dense and rise while cold air contracts and becomes more dense and falls. hope this helps

Answer:

Ala escala del uno al diez

Answer:

c. Waste

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Explanation:

Hatdog

Answer:  it would be natural selection

Explanation:

Answer:

No

Explanation:

In every action you make you use energy, when you sleep you still have to breathe and regulate tempetaure. If you stopped giving energy to your cells as you sleep you not be able to breathe.

Answer:

Its a COYOTE

Explanation:

Answer:

It basically means that everyone is a genius in their own way and everyone has their own skills. If you decide to judge someone on what they cannot do (eg. a fish climbing a tree) rather than what they can do, it's gonna make the person feel $tupid their entire life. Not everyone can do the same thing and not everyone has the same abilities. A fish may not be able to climb a tree, but it can swim well. Just like a bee wouldn't be able to swim, but it can fly.

Answer:

peace

Explanation:

All the other options are bad. Peace would bring unity.

Natural Disasters-can infect waters,kill peoplw,etc.

Competition-people killing each other or animals to gain something over their opponent

Diseases-kills people,brings anxiousness

Predation-Kills animals. No animals,bad environment

Answer:

peace is the factor that will not cause that

Answer:

help provide better medical care and technology

Explanation:

Answer:

using simple common sense we can see that the best preformed rats get more food, which makes them fat

Explanation:

Answer:

ice pack

Explanation:

Answer:

Swimming in cool water, taking a lukewarm bath, or applying cold water to the body can reduce body temperature.

Explanation:

hope this helps you!