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Tatiana [17]
3 years ago
9

A researcher is designing a laboratory experiment to determine whether the inorganic substance A affects the rate of a reaction

between two colored liquids,X and Y. When the reaction is complete, the liquid is clear. The reaction between X and Y is similar to one used by manufacturers to produce certain chemicals in factories
Which method would best answer his question about reaction rate and what will he find out about substance A

Biology
1 answer:
andreyandreev [35.5K]3 years ago
6 0
First he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance is a catalyst
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Answer:

(B) HEK cells exposed to the most hypotonic conditions will display the greatest degree of AQP5 membrane localization, allowing water to flow into the cells.

Explanation:

The function of AQP5 (an aquaporin) is to allow the water to move into or out of the cell down the concentration gradient. When placed in hypotonic solutions, the internal environment of HEK cells will be hypertonic. Water always moves from hypotonic (higher water concentration) to hypertonic (lower water concentration) solution.  

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Answer:

C.

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Answer:

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In testicular tissue, Leydig cells produce androgen hormones: androsterone and testosterone. The ovaries produce a group of estrogen hormones and progesterone. These hormones exert their effect at puberty when the glands are activated. At puberty, the pituitary gonadostimulins activate the sex glands, whose activity leads to the development of secondary sex characteristics (the appearance of first menstruation in girls, beards and mustaches in boys, etc.).

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