A change in a gene's DNA sequence is a(n)
A) genotype.
B) nucleotide.
C) mutation.
D) genome.
C) mutation.
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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.
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
The scientist who developed the theory of natural selection was ____
a. Malthus b. Crick c. Watson d. Darwin e. Smith
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.