Which of the following is NOT true of human
chromosomes?
a. The haploid number is 23.
b. The diploid number is 46.
c. There are 23 pairs of chromosomes.
d. Human gametes end up with two of each
type of 23 chromosomes.
e. Human gametes end up with one of each
type of 23 chromosomes.
D
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The membranous sac enclosing the glomerulus of a mammalian kidney is called:
A. Bowman's capsule. B. the nephron. C. the renal pyramid. D. the medulla. E. the renal pelvis.
Which one of the following is considered to be an important plant hormone that helps plants cope with environmental stresses?
A. Auxins.B. Prostaglandins. C. Ethylene. D. Abscisic acid. E. Cytokinins.
Why doesn't a tapeworm have a mouth on its scolex?
A. The mouth is on the proglottids B. Endoparasites don't need a mouth C. The mouth is located at the end of the pharynx D. Tapeworms use a radula instead of a mouth to feed
Sexual reproduction
a. leads to uniform characteristics within a population. b. results in new combinations of genetic traits. c. creates genetic clones. d. requires less tissue differentiation than asexual reproduction. e. produces genetic clones and requires less tissue differentiation than asexual reproduction.