Which of the following structures or activities is NOT directly part of the endomembrane system?
a. budding
b. lysosomes
c. ribosomes
d. peroxisomes
e. Golgi complex
C
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Cheetahs have been through a genetic bottleneck; evidence for this is that
A. the body is long, thin, and graceful. B. these cats are members of an endangered species. C. there is very little genetic variability. D. little natural selection occurs in this species. E. they originally came from small areas of Africa.
Formation of urine involves filtration, reabsorption and secretion, all of which are done by the bladder.
a. true b. false
Enzymes are important because they
A) allow reactions to occur at body temperature. B) increase the body temperature of organisms. C) can enable organisms to evade the laws of thermodynamics. D) are structural proteins that make up bodily tissues. E) bind irreversibly to substrates.
Which of the following is not a common component of circulating blood?
a) blood plasma b) formed elements c) proerythrocytes d) platelets e) leukocytes