The above figure represents a(n)
a. atom.
b. tissue.
c. molecule.
d. organ.
e. cell
E
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A town has several lakes connected by small streams or creeks. All the trout within a single lake is considered a ________________. The trout in all of the lakes constitutes a ________________
A. metapopulation; local population B. local population; metapopulation C. corridor population; metapopulation D. metapopulation; corridor population E. equilibrium population; corridor population F. corridor population; equilibrium population
Gastrulation producesa(n) ____
a. hollow balls of cells b. embryo with germ layers c. solid balls of cells d. haploid cells e. yolk sac
If one side of a small DNA molecule has the nucleotide sequence 5'-AATCGC-3', the opposite side
sequence would read (left-to-right) ____________________. Fill in the blank(s) with the appropriate word(s).
You examine a worm that has two genders: males that produce sperm and hermaphrodites that produce both sperm and eggs. The diploid adult has four homologous pairs of chromosomes that undergo very little recombination
Given a choice, the hermaphrodites prefer to mate with males, but just to annoy the worm, you pluck a hermaphrodite out of the wild and fertilize its eggs with its own sperm. Assuming that all the resulting offspring are viable, what fraction do you expect to be genetically identical to the parent worm? Assume that each chromosome in the original hermaphrodite is genetically distinct from its homolog. (a) all (b) none (c) 1/16 (d) 1/256