If a behavior has evolved by natural selection, it must have ______________. 

A. benefits for both males and females
B. reduced the predation rate on the animal
C. evolved the same way in each species
D. a genetic basis


D. a genetic basis

Biology & Microbiology

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DNA replication is bidirectional in prokaryotes with circular chromosomes

Indicate whether the statement is true or false.

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The bulk of the reabsorption of useful materials by the kidney takes place in the

A. renal corpuscle. B. proximal convoluted tubule. C. loop of Henle. D. distal convoluted tubule. E. collecting ducts.

Biology & Microbiology

Which type of microscope creates an image by capturing electrons ejected from the specimen?

a. LM b. TEM c. SEM

Biology & Microbiology

Abiotic components of an ecosystem include

A. only animal life. B. both living and nonliving components. C. living components only. D. nonliving components only. E. all components except animal life.

Biology & Microbiology