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Mila [183]
3 years ago
10

The parathyroid glands are usually located on which surface of the thyroid gland

Biology
1 answer:
jekas [21]3 years ago
4 0
On the posterior surface
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C. Hypothesis

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Fluorine is a chemical element with symbol F and atomic number 9. Classified as a halogen, Fluorine is a gas at room temperature.

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The plasma membrane is involved in which activities? Choose one or more:
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1. import and export of nutrients and wastes

2. cell signaling

3. cell recognition

4. cell growth and motility

Explanation:

Plasma membranes are selectively permeable which means it only allows selective molecules to cross through it. So the plasma membrane helps in the import and export of nutrients by simple diffusion, facilitated diffusion or through active transport.

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Recall the three discoveries Erwin Chargaff made while studying DNA: the total amount of pyrimidines (T+C) equals the total amou
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All of the answer options are correct.

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Chargaff contributed in understanding the structure and composition of DNA with his discoveries. He discovered that purine and pyrimidine bases are in equal amounts in a DNA molecule. He also discovered that amount of Adenine base (A) is equal to amount of Thymine base (T). It means that A pairs with T. Since A is a purine and T is a pyrimidine it also implies that purine base pairs with a pyrimidine base. This conclusion can also be arrived by taking in consideration the other base pair which is G (purine) and C (pyrimidine).

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