The bones in the forelimbs of a mammal
a. can often be traced to a common ancestor.
b. offer no evidence to support the theory of
evolution.
c. perform the same function no matter which
species they are in.
d. may exhibit either analogy or homology but
not both when compared to the forelimb of
another animal.
e. show convergence with some invertebrate
structures.
A
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Early in mitosis chromatin condenses into the compact, rodlike structures known as chromosomes
Which of the following processes takes place more easily as a result?
a. disappearance of the nuclear envelope b. replication of DNA c. orderly distribution of DNA into the two new nuclei d. formation of the mitotic spindle e. disintegration of nucleoli
Approximately when did the earth's crust solidify?
A. 8 billion years ago B. 1 billion years ago C. 4 billion years ago D. 4 million years ago
In which season does lake stratification occur?
A) summer B) spring C) fall D) winter
Much of the nitrogen taken in by a plant is used to synthesize the molecules rubisco and ________
Fill in the blank(s) with correct word