Nervous tissue is composed of two types of cells: ________ that conduct impulses and ________ that surround and protect these cells
Fill in the blank(s) with correct word
neurons; glial cells
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Which statement best describes the phylogenetic relationship between protists, fungi, plants, and animals?
a. Fungi and animals share a common protist lineage, while plants arose from a different protist ancestor. b. Fungi and plants share a common protist lineage, while animals arose from a different protist ancestor. c. Animals and plants share a common protist lineage, while fungi arose from a different protist ancestor. d. Plants, animals, and fungi each arose from a different protist lineage. e. Plants, animals, fungi, and protists each arose from the same prokaryotic ancestor.
With ____ selection(s), the allele frequency
will shift in a consistent direction.
a. directional b. stabilizing c. disruptive d. frequent e. mutational
Hyperpolarization of a neuron causes the membrane potential to become _______ negative and is largely responsible for the _______ refractory period.
A. less/absolute B. less/relative C. more/absolute D. more/relative
Genetic drift has the strongest effects in populations that are:
a) in Hardy-Weinberg equilibrium. b) small. c) characterized by extensive gene flow. d) undergoing natural selection. e) large.