Island populations are more vulnerable to
__________ than their mainland counterparts.
a. storms
b. disease
c. droughts
d. genetic drift
e. all of these
Answer: e
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Multiple hydrogen bonds together stabilize proteins into a spiral structure called a ____
a. water lattice
b. alpha helix c. chemical groups d. delta minus e. delta plus
The fossil records indicates that ________ lived in families of male-female pairs, used fire, and left evidence of social cooperation (lived communally).
A) Homo habilis B) Australopithecus C) Dryopithecus D) Homo erectus
A limitation of transgenesis is that
A) it only works on very short genes. B) it only works on vertebrates. C) the transgene can insert many copies of itself in the genome. D) the transgene could disappear before it inserts in the genome.
Identify the stage of mitosis in photo B
a. interphase b. prophase c. metaphase d. anaphase e. telophase