What is the starting material that plastics are made from?

Biology

2 answers:

Anuta_ua [19.1K]3 years ago

6 0

The "plastics" come from oil seeing as that is the only thing on the list.

Ipatiy [6.2K]3 years ago

3 0

The term “plastics” includes materials composed of various elements such as carbon, hydrogen, oxygen, nitrogen, chlorine, and sulfur. Plastics typically have high molecular weight, meaning each molecule can have thousands of atoms bound together. Naturally occurring materials, such as wood, horn and rosin, are also composed of molecules of high molecular weight. The manufactured or synthetic plastics are often designed to mimic the properties of natural materials. Plastics, also called polymers, are produced by the conversion of natural products or by the synthesis from primary chemicals generally coming from oil, natural gas, or coal.

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Antidiuretic hormone A) increases the permeability of the collecting ducts to water by increasing the number of aquaporins. B) i

bazaltina [42]

Answer:

A) increases the permeability of the collecting ducts to water by increasing the number of aquaporins.

Explanation:

ADH is an hormone of the anterior pituitary gland concern with osmoregualtion. When the solute potential of the blood rises , with decrease in water potential , the water levels of the blood drops, the osmoreceptors in the hypothalamus sensed this from the circulatory blood and prompted the hypothalamus to stimulate the anterior pituitary gland to secrete ADH.

The hormone is carried in the circulating blood to the walls of the collecting ducts where it binds with the receptors on the walls of the tubule,which increases the fusing and binding of Aquaporins to the membrane of the collecting ducts to increase re absorption of water back into the blood, raising the water potential of the blood.

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attashe74 [19]

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Greeley [361]

Answer:

B. The part of an aquifer where surface water reaches the water table

Explanation:

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So, the required answer is :

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