The tough connective tissue sac surrounding the heart is the
A. myocardium.
B. epicardium.
C. peritoneal cavity.
D. pericardium.
E. endocardium.
D. pericardium.
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Which of the following is the purpose of the functional photoreceptors in a blind mole rat?
a. They transmit light form the environment. b. They absorb light from the environment. c. They properly set the biological clock. d. They properly set the position of the animal.
Which of the following cell structures is associated with cellular respiration?
a. Golgi apparatus b. lysomes c. mitochondria d. vacuoles
Which of the following is an important force for evolution?
A. Mutation B. Genetic drift C. Migration D. Natural selection E. All of the above
All of the following are true about archaea except
A) They are prokaryotes. B) They lack peptidoglycan in their cell walls. C) Some are hyperthermophiles, some are extreme halophiles others are methanogens. D) They evolved before bacteria. E) Some produce methane from carbon dioxide and hydrogen.