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KATRIN_1 [288]
3 years ago
15

Tadpoles must undergo a major metamorphosis to become frogs. This change includes reabsorption of the tail, growth of limbs, cal

cification of the skeleton, increase in rhodopsin in the eye, development of lungs, change in hemoglobin structure, and reformation of the gut from the long gut of an herbivore to the short gut of a carnivore. Amazingly, all of these changes are induced by thyroxine. What is the most likely explanation for such a wide array of effects of thyroxine?
Biology
1 answer:
nevsk [136]3 years ago
4 0

Answer:

There are many receptors for thyroxine on different target cells (tissues), so its effect can be huge

Explanation:

Target cell for a certain hormone is a cell that have hormone receptor specific for that hormone. There are two main types of receptors on target cell:

  • cell membrane receptors (also called  trans membrane receptors)-usually for peptide hormones, such as insulin
  • intracellular receptors (also called nuclear receptors)-usually for steroid hormones, such as testosterone.

Hormone binding to the receptor leads to the signal cascade within the cell, which results in cell response.

Receptors for thyroid hormones are nuclear receptors.

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Luda [366]

Answer:

Venus should be b

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Explanation

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3 years ago
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How may the height of a water table create a spring
yaroslaw [1]
When prolonged and excessive rainfall the more water percolates and the water table (below the earth surface/soil) rises.  The higher the water table the more the possibility increases for a spring to form in the sense that it would now be easier for the water to find a means of escaping the underground through perhaps a crack or a cave, etc.
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4 years ago
In a healthy cell, the rate of DNA repair is equal to the rate of DNA mutation. When the rate of repair lags behind the rate of
kvv77 [185]

Answer:

The possible fate of the cell that it may turn cancerous.

Explanation:

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3 0
4 years ago
A plant's stem _____.
Natali5045456 [20]

Answer:

All the above

Explanation:

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Stems have four main functions which are:[1]

Support for and the elevation of leaves, flowers and fruits. The stems keep the leaves in the light and provide a place for the plant to keep its flowers and fruits.

Transport of fluids between the roots and the shoots in the xylem and phloem(see below)

Storage of nutrients

Production of new living tissue. The normal lifespan of plant cells is one to three years. Stems have cells called meristems that annually generate new living tissue.

3 0
3 years ago
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