Which type of morphologic evidence shows the closest evolutionary relationship?
a. analogous structures
b. structural plasticity
c. homologous structures
d. structural functions
c. homologous structures
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In a fetal pig, dorsal and ventral refer respectively to
(a) the head and tail regions of the body. (b) the tail and the head regions of the body. (c) the upper (back) portion and the lower (underside) portion of the body. (d) the lower (underside) portion and the upper (back) portion of the body.
A particular haploid strain of yeast contains a temperature-sensitive mutation in its cdc2 gene resulting in no functional Cdc2 protein at the nonpermissive temperature
At the nonpermissive temperature, each of the following events would fail to occur at the appropriate cell cycle stage except A) replication of DNA. B) fragmentation of the nuclear envelope. C) condensation of chromosomes. D) appearance of the mitotic spindle. E) prevention of fusion of chromosome ends.
In the late 1700s, two populations of minnows became isolated when an earthquake altered the path of a river. Now the populations can no longer successfully breed with each other even when they are both moved to the same pond
These organisms have undergone ________ speciation. Fill in the blank(s) with correct word
________ are the mammals with the greatest number of species
A) Primates B) Marsupials C) Whales D) Rodents E) Bats