Which of the following have a single, circular chromosome?

a. Archaea
b. Bacteria
c. both Archaea and Bacteria
d. neither Archaea nor Bacteria
e. only methanogens


C

Biology & Microbiology

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In a normal cell, cell death typically occurs in which phase of the cell cycle?

A) G1 B) S C) G2 D) M E) all of the above

Biology & Microbiology

Define the Oparin-Haldane hypothesis and explain how it has been tested in a laboratory

What will be an ideal response?

Biology & Microbiology

Hemolytic disease of newborns comes about when the mother is ______ and the baby is ______

A. Rh positive; Rh negative D. Rh negative; Rh negative B. Rh negative; Rh positive E. more than one of these; more than one of these C. Rh positive; Rh positive

Biology & Microbiology

An example of territoriality is

A. barnacles attached to a boat bottom. B. a swarm of mosquitoes hovering around a sweaty person. C. a red-winged blackbird singing to ward off other males and attract a female to the nest in his fencerow. D. a cloud of moths attracted to a light. E. All of the choices are correct.

Biology & Microbiology