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Nat2105 [25]
3 years ago
10

When we see chiasmata under a microscope, that lets us know which of the following has occurred?

Biology
1 answer:
ioda3 years ago
4 0
When we see chiasmata under a microscope, that lets us know that prophase I has occurred. During this phase of meiosis, the nuclear envelope breaks up and disappears, and so does nucleolus. The chromosomes become visible at this point.
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What clues could you use to help determine whether movement of oslutes through the apicl and basolateral cell membranes is passi
Setler79 [48]

Answer:

Clues that can be used to determine whether the movement of solutes through the membrane is passive or active could be the molecule size, membrane potential, and the presence/absence of membrane protein.

Explanation:

Solutes transport through the cellular membrane depends on the solute size, membrane potential, and the presence/absence of integral membrane protein.

There are two types of transport: Active and passive.

-        Passive transport: It does <u>not need energy</u>; it is driven by a chemical potential gradient. <u>Small molecules</u> with no charge are transported through the membrane in a gradient favor, from a high concentration region to a low concentration region. There are two types of passive transport: <em>By simple diffusion</em> (small molecules pass through the membrane by themselves) and by <em>facilitated diffusion</em> (molecules are helped by integral membrane proteins to pass through the membrane). In facilitated diffusion, the helping protein can be a <u>channel protein</u> (hydrophilic pores that allow the molecule to pass with no interaction) or a <u>carrier protein</u> (proteins with mobile parts that suffer modification as the molecule pass to the other side).

-         Active transport: It <u>does need ATP energy</u> to pass the molecule through the membrane, as they have to <u>move against the electrochemical gradient</u>. This kind of transport is always mediated by a <u>carrier protein</u>. These proteins join with the molecules and suffer changes as they pass the solute to the other side of the membrane. An important example of this kind of transport is the sodium-potassium bomb.

6 0
3 years ago
Which treatment for a heart attack requires threading of a narrow tube or catheter through an artery to the heart? ​?
Ilya [14]
The correct answer is angioplasty.
<span>
Angioplasty is one of the treatments after heart attack including special tubing with an attached deflated balloon. The tube is threaded up to the coronary arteries. Angioplasty is usually combined with the placement of a small tube called a stent which helps to restore the flow of blood through the artery and decreases its chance of narrowing again.</span>
4 0
3 years ago
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The second drawing shows a situation when a larger force is applied to the box than the force of friction. The result is that th
Hunter-Best [27]

Answer:

B

Explanation:

because they are moving at the same direction

8 0
3 years ago
What is the responsibility of circulatory system​
KiRa [710]

Answer:

itis responsible for the circulation as wel as purification of blood in the human body

3 0
3 years ago
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"A plant system must balance its need for water with its need for carbon dioxide and oxygen. If too much water is lost, the stom
levacccp [35]

Answer:

Guard cells

Explanation:

Guard cells are the cells that are found around the openings of the stomata, their functions is that they regulate the opening and closing of the stomata. These cells are always fill with latex which is of high percentage of water, therefore when the intake of water is low, the functionality of the cells will be affected.

And it must be noted that, the stomata is very important in the exchange of gases, that is a process where oxygen is released and carbon dioxide is absorbed. Therefore when the cells are affected, the gas exchange will also be effected.

6 0
3 years ago
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