Charles Darwin proposed the theory of evolution based on data he collected during:
a. the Beagle expedition.
b. the Challenger expedition.
c. the observations of Agassiz.
d. Alvin's dives.
e. his time spent on the rocky coastline of England.
A
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Early classification systems of the bacteria employed all of the following characteristics except
A. the ability to photosynthesize. B. rRNA sequences. C. motility. D. colony or filament forming. E. sporulation or binary fission.
The probability of obtaining a dominant phenotype from self-fertilization of a heterozygous individual is
A. 25% B. 50% C. 75% D. 100%
Refer to the accompanying figure. Which structure is the source of sebum, a substance that inhibits bacterial growth on the surface of the skin?
a. 5
b. 7
c. 10
d. 11
e. 12.
If a cell suddenly loses the ability to activate fatty acids by the attachment of a CoA molecule, what will be the most significant impact on the cell membrane?
A. phospholipids will no longer be synthesized in the ER B. cholesterol will no longer be made C. phospholipids will no longer flip between leaflets D. integral membrane proteins will dissociate from the membrane E. all phospholipid head groups will be identical