The prokaryotes known as methanogens require ________ environments.

A. aerobic
B. acidic
C. high salt
D. high temperature
E. anaerobic


Answer: E

Biology & Microbiology

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If carrier testing determines that one parent is a heterozygous carrier of an autosomal recessive genetic defect, while the other parent is not a carrier, then the fetus has a(n) ____________________ % chance of being affected

Fill in the blank(s) with correct word

Biology & Microbiology

The algal ancestors of land plants are most likely similar to the ____

a. Rhodophyta b. Phaeophyta c. Chrysophyta d. Charophyta e. Radiolaria

Biology & Microbiology

In the first experiment to test the pedometer hypothesis in Sahara desert ants, which results did the researchers obtain?

A. Ants with normal legs walked past the home nest, ants with stumps found the nest, ants with stilts were short of the nest B. Ants with stilts walked past the home nest, ants with normal legs found the nest, ants with stumps were short of the nest C. Ants with stumps walked past the home nest, ants with normal legs found the nest, ants with stilts were short of the nest D. None of the above

Biology & Microbiology

Punctuated equilibrium is:

a. a theory about the pace of evolutionary change in which rapid periods of evolutionary change are punctuated by longer periods with little change. b. a theory about the pace of evolutionary change in which long periods of evolutionary change are punctuated by short periods with rapid change. c. a way of explaining the idea of "evolution by creeps." d. a way of explaining the idea of "evolution by jerks." e. Both the first and fourth choices are correct.

Biology & Microbiology