Which type of muscle in humans is involved in voluntary body movements?
A) skeletal
B) cardiac
C) smooth
D) endothelial
A
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You discover a new species of protist. Which of the following characteristics would provide the strongest evidence for your hypothesis that your species belongs in Euglenida?
A) It is photosynthetic. B) It contains the carbohydrate paramylon. C) It reproduces asexually. D) It is unicellular. E) It lacks a cell wall.
Bioluminescence is:
A. the production and emission of light by organisms B. the capture of moonlight for nocturnal photosynthesis C. the absorption of light by pigments for transfer to chlorophyll a D. the ability to detect and move away from sources of light E. the ability to detect and move toward sources of light
The two major forces contributing to allopatric speciation are:a
mutation and natural selection. b. natural selection and migration. c. nonrandom mating and migration. d. natural selection and genetic drift. e. genetic drift and mutation.
Tertiary and quaternary structure of proteins involves ________ bonds
A) hydrogen B) ionic C) polar covalent D) nonpolar covalent E) ionic, hydrogen, polar, and nonpolar covalent