Synapsis refers to the ____
a. crossing-over between homologous chromosomes
b. alignment of homologous chromosomes along the equatorial plane
c. alignment of sister chromatids along the equatorial plane
d. pairing of homologous chromosomes during prophase I
e. pairing of sister chromatids during prophase II
ANSWER: d
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The hydroxyapatite that makes up the bulk of the bony endoskeleton of vertebrates is found in:
A. osteocytes. B. the extracellular matrix of osteocytes. C. the collagen. D. osteoblasts.
Which conclusion can be drawn from Gause's experiments on interspecific competition between two species of
Paramecium that are cultured together and feed on the same resource?
a. Both populations of Paramecium expire due to a build-up of waste products. b. One population of Paramecium used the other as a food source. c. Paramecium populations survive well together because they have no limiting resources. d. When two populations of Paramecium use the same limiting resource, they can coexist long term. e. When two populations of Paramecium use the same limiting resource, they cannot coexist long term.
A J-shaped growth curve is converted to an Sshaped
one
a. when the parents are past reproductive age. b. if the data is plotted in reverse. c. when the carrying capacity is reached. d. if reproduction is stopped. e. only for fast-growing populations such as bacteria.
Which of the following is not part of the lichen association?
A. Brown algae B. Cyanobacteria C. Green algae D. Ascomycetes