Anaerobic bacteria may use ________ as the final electron acceptor during anaerobic respiration.

A. nitrate only
B. carbon dioxide only
C. sulfate only
D. either nitrate and sulfate
E. carbon dioxide, nitrate and sulfate


Answer: D

Biology & Microbiology

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When a plant reaches sexual maturity, the genes that control the production of __________

are inactivated and the genes that control __________ are activated.

a. flowers; leaves b. flowers; roots c. leaves; flowers d. leaves; roots

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The first photosynthetic organisms to obtain hydrogen by splitting water were the cyanobacteria

__________ Indicate whether the statement is true or false.

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Two of the divisions of the nervous system are nerves that control voluntary actions and nerves that control involuntary actions. These nerves are both found in the ________ nervous system

A) central B) somatic C) peripheral D) spinal

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The term clade most closely refers to:

a. a class. b. the binomial system of classification. c. a mechanism of horizontal gene transfer. d. a subspecies of organisms does not include a subgenus. e. a group of organisms that share common characteristics inherited from a common ancestor.

Biology & Microbiology