How does habitat fragmentation affect biodiversity?
a. As long as the fragments are of good quality habitat, biodiversity will not be affected.
b. Habitat fragmentation increases biodiversity because it reduces entry of exotic species.
c. Habitat fragmentation is a threat to biodiversity because small habitat patches sustain only
small populations.
d. Habitat fragmentation increases biodiversity because adaptation to local conditions
stimulates evolution.
e. Habitat fragmentation connects terrestrial and aquatic habitats.
C
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Hominin fossil footprints that are obviously bipedal date to about ________ years ago
A) 50,000 B) 100,000 C) 3.6 million D) 12 million
Males that tend to be taller than average and
show mild mental impairment may have a. XXY chromosomes. b. XYY chromosomes. c. Turner syndrome. d. Down syndrome. e. none of these.
The gray crescent is
a. formed where the sperm penetrates the egg. b. formed opposite from where the sperm enters the egg. c. the portion of the egg where the yolk is found. d. located next to the vegetal pole of the egg. e. the point where the first cleavage occurs.
Examples of short-day plants are:a
poinsettia. b. florist's chrysanthemum. c. spinach. d. black-eyed Susan. e. both poinsettias and chrysanthemums.