In the cyclic electron pathway of the light reactions, electrons energized by the sun leave photosystem I and enter

What will be an ideal response?


an electron transport chain that produces a hydrogen ion gradient.

Biology & Microbiology

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Individual species do not differ in the vitamins and essential amino acids and fatty acids they require

Indicate whether the statement is true or false.

Biology & Microbiology

The extraembryonic membrane closest to the embryo is the:a

amnion. b. archenteron. c. chorion. d. blastocyst. e. neural plate

Biology & Microbiology

To stabilize the environment in the Biosphere II habitat and enable it to become self-sufficient again, it would be helpful to

What will be an ideal response?

Biology & Microbiology

Negative-feedback control involves which of the following? 

A. The product of a gland stimulates the gland to produce more product. B. The product of gland A stimulates gland B to produce its hormone, which inhibits gland A. C. The hormone produced by gland A stimulates gland B. D. The hormone produced by gland A stimulates gland B to produce its hormone, which stimulates gland A.

Biology & Microbiology