A change in a gene's DNA sequence is a(n)

A) genotype.
B) nucleotide.
C) mutation.
D) genome.


C) mutation.

Biology & Microbiology

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If a cell or tissue has a receptor for a hormone, that cell or tissue is

a. an endocrine gland. b. a paracrine tissue. c. a neuroendocrine tissue. d. a target tissue. e. a signaling tissue.

Biology & Microbiology

The male sage grouse who is “displaying” is likely _____

a. indicating that he are ready to spar with other males b. claiming part of the territory as his own c. attracting a mate in a monogamous union d. attracting a mate in a polygamous union e. indicating that he has won a mate

Biology & Microbiology

The scientist who developed the theory of natural selection was ____

a. Malthus b. Crick c. Watson d. Darwin e. Smith

Biology & Microbiology

The location of the pericycle is best described as

A) between layers of primary xylem and primary phloem. B) the outermost layer of the root vascular cylinder. C) a band wrapped around cells of the endodermis. D) just beneath the epidermis. E) adjacent to the shoot apical meristem.

Biology & Microbiology