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devlian [24]
2 years ago
13

Natural selection works to produce change at which of the following levels?

Biology
1 answer:
SOVA2 [1]2 years ago
6 0

Answer:

Populations is the correct answer

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The release of an inorganic phosphate from the myosin molecule directly results in ________
zhuklara [117]

Answer:

power stroke

Explanation:

  • The process of muscle contraction requires several steps.
  • The most famous theory on how the contraction and relaxation of muscles take place is the sliding filament theory.
  • However, this theory has been refined and one important addition to it is the mechanism by which myosin can pull actin and cause shortening of the sarcomere.
  • For the movement of myosin, it binds and releases actin and forms cross bridges.
  • Myosin is subdivided into two regions - S1 and S2. The contraction of the S1 region is what constitutes the power stroke.
  • An important requirement of the power stroke is the hydrolysis of ATP to release an inorganic phosphate which provides energy for the process.
3 0
3 years ago
Which plant system is affected when xylem tissue is removed
Gennadij [26K]
The answer is most likely "vascular system". Xylem tissue is a part of a plant's vascular system. Which is mostly responsiple for transportation (of water, food etc.) in a plant. The vascular system of plants is made of two tissues. One is Xylem and the other is Phloem. Phloem transports food from leaves to all other parts of the plant. And Xylem transports water and minerals (which are dissolved in the water) to the leaves. 

So if you remove the <u>Xylem</u> tissue from a plant, its vascular system will be affected.
4 0
3 years ago
Which of the following is a form of active transport? A) Sodium-potassium pump  B) Simple Diffusion  C)Osmosis     AND WHY?
Bingel [31]
I think simple diffusion is a former of active transport
7 0
3 years ago
Question 4
olga55 [171]

Answer:

hii friend follow me me please

8 0
3 years ago
People with type ab blood are considered the "universal recipient" for transfusions because their blood is plentiful in a and b
Murrr4er [49]

The correct answer is their blood lacks A or B antibodies.

People with type AB blood have A and B antigenes on the surface of red blood cells (RBCs). Antigen AB  has no antibodies, thus, transfusion can be considered safe ( the serum of the recipient does not contain antibodies for the blood cell antigens of the donor).


3 0
3 years ago
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