Competitive exclusion is based upon the idea
that
a. one species will voluntarily allow the other
to survive.
b. no two species can completely occupy the
same niche.
c. the larger species will dominate the smaller.
d. competition is overrated as a factor in
species survival.
e. two species can live together, if they share
the same niche but only at alternate times
B
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In prokaryote DNA replication, nuclotide
assembly is
a. faster than eukaryotes. b. slower than eukaryotes. c. about the same speed as eukaryotes. d. sometimes slower; sometimes faster than eukaryotes. e. none of these
A significant polymorphic inversion on chromosome 17, the MAPT inversion, is identified by marker SNPs that can now be used to screen large numbers in a population. The inverted region is large and extends for approximately 900 kb
The two haplotypes (one inverted and one not) are each associated with increased risk of a number of neurological conditions. How can the inverted region be used to find the most recent common ancestor of the inversion? A) by typing SNPs from humans and from other primates B) by assessing SNPs from a large number of human populations C) by looking for heterozygotes for the two kinds of chromosome 17 D) by fertility studies on populations with each of the haplotypes E) by using a BAC clone library to identify the ends of the inversion
CO2 enters the inner spaces of the leaf through the
a) cuticle. b) phloem. c) walls of guard cells. d) epidermal trichomes. e) stoma.
According to the animation, what does oxygen get reduced to at the end of the electron transport chain?
a. ATP b. NADH c. Water d. Electrons e. Protons