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Alika [10]
2 years ago
9

Can i get help on scienceee plss

Biology
2 answers:
NeTakaya2 years ago
8 0
Your answer should be the third choice. Hope this helps!
ale4655 [162]2 years ago
7 0
I thinks its a layer of soil with characteristic properties, sorry if its wrong I'm a beginner
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If two minerals have the same chemical composition but cleave into different shapes, which must be true? A. They have different
wariber [46]
B - They have different arrangements of atoms.
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3 years ago
2. Which freshwater source do you think is most important to people? Why?
kondor19780726 [428]

Answer:

Groundwater

Explanation:

Groundwater, which is in aquifers below the surface of the Earth, is one of the Nation's most important natural resources. Groundwater is the source of about 33% of the water that county and city water departments supply to households and businesses (public supply).

6 0
2 years ago
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Navah writes out the chemical equation for photosynthesis. She includes two reacting molecules to the left of the arrow and two
Nadya [2.5K]
A. light energy, above the arrow

<span>Photosynthesis is a process wherein light energy is converted into chemical energy. </span>
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6 0
3 years ago
Look at the picture below.
AlekseyPX
You forgot to show us a picture bro
7 0
3 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
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