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Airida [17]
3 years ago
11

????????????????????????

Biology
1 answer:
DanielleElmas [232]3 years ago
3 0

Answer:

nice bed sheets

Explanation:

its A i just finished with that a few days ago a

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​why is it that bottle-feeding a baby in developing nations has so much potential to be disastrous to the baby's health
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Which statements describe the Peary Land ecosystem? Select all that apply
fgiga [73]

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hope this helps a lot:3

4 0
2 years ago
Choose the correct order of steps for the synthesis of Vitamin D.
n200080 [17]

Answer:

The correct answer will be option-

1. UV light strikes the skin and converts a steroid molecule into an inactive form of vitamin D.

2. Inactive vitamin D is transported to the liver where it is modified.

3. Vitamin D is activated under the influence of PTH.

4. Inactive, chemically altered vitamin D is transported to the kidneys.

Explanation:

Vitamin D is a fat-soluble metabolite which helps maintain the health of the bone by maintaining the calcium homeostasis.

The vitamin D is synthesized mainly in the liver and kidney from the biologically inactive precursor of vitamin D called ergocalciferol and Cholecalciferol.

The inactive vitamin is synthesized in the skin when the skin is exposed to UV rays.  The UV rays convert the 7-dehydrocholesterol, a steroid molecule to Vitamin D3, This inactive vitamin is then transported to the liver where it is converted to 25-hydroxyvitamin D.

This vitamin D form is further metabolized in the kidney controlled and regulated by the Parathyroid glands.

4 0
3 years ago
What is it when one organism benefits and the other is harmed
Artemon [7]
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