Zonation within a community is typically the result of differences in the

A) patterns of predation among species within a community.
B) rates of reproduction among species within a community.
C) patterns of competition among species within a community.
D) physical characteristics of the environment across a spatial gradient.


D

Biology & Microbiology

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The sequence of genes in each T4 virus within a population is the same but starts with a different gene at the 5' end. If each of these linear pieces is circularized, the gene sequences would be identical. The T4 DNA, therefore, is described as being

A. a linear repeat. B. circularly permuted. C. linearly palindromic. D. two fold rotationally symmetrical.

Biology & Microbiology

Chlamydia trachomatis causes

A. gonococcal urethritis. B. trachoma. C. dental caries. D. trachoma and nongonococcal urethritis.

Biology & Microbiology

Kinetic organisms can move themselves by all except:

a. flagella. b. jet propulsion. c. undulation of the body. d. using turbulent mixing.

Biology & Microbiology

During which phase does a nuclear membrane form around each of the two nuclei?

a. prophase b. metaphase c. anaphase d. telophase e. cytokinesis

Biology & Microbiology