Which of the following is most likely to be the source of most of the oxygen in the atmosphere?

A) weathering of rocks
B) UV radiation
C) photosynthesis
D) macroevolution


C

Biology & Microbiology

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In the savanna, ____ lasts for months

a. cold temperatures b. storms c. periods of fast growth d. fires e. droughts

Biology & Microbiology

Which organ system filters wastes from the

blood?

a. respiratory b. urinary c. digestive d. endocrine e. circulatory

Biology & Microbiology

The lungs move easily within their protective sacs due to

a. intrapleural fluid. b. leaking plasma. c. blood. d. mucus. e. both leaking plasma and mucus.

Biology & Microbiology

Identify the role of oxygen in photosynthesis

A) It is split to form sugar. B) It is the final electron acceptor. C) It is a waste product in the light reactions. D) It is the initial electron releaser.

Biology & Microbiology