The gradual change in specific human mitochondrial DNA sequences along a river illustrates

A) a founder effect.

B) a population bottleneck.

C) a cline.

D) spontaneous mutation.


C) a cline.

Biology & Microbiology

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It is through ____ that we further our knowledge of living things

a. ideologies b. biological research c. philosophy d. ethics e. logic

Biology & Microbiology

During which phase does crossing-over occur?

a. interphase b. prophase I c. metaphase I d. prophase II e. metaphase II

Biology & Microbiology

The ancestors of land plants were probably ________ that lived in ________

A) green algae similar to charophytes; the open ocean B) green algae similar to charophytes; coastal marshes or lake fringes C) cyanobacteria; coastal marshes or lake fringes D) cyanobacteria; moist soil crust communities

Biology & Microbiology

Organisms that require organic sources of carbon and energy are called (chemoheterotrophs/chemoautotrophs/autotrophs)

What will be an ideal response?

Biology & Microbiology