In some animals, such as the marsh wren, one male bird mates with several females. This is known as:
a. polygyny.
b. polyandry.
c. monogamy
d. a dominance hierarchy.
e. codominance.
a
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The Golgi complex functions to
A) modify and secrete proteins to the external environment. B) sort proteins used within the cell. C) both modify and sort proteins into those destined for secretion and those that function in membrane structures. D) synthesize proteins.
In addition to the clonal deletion of self-reactive T cells that occurs during embryonic development, autoreactivity of T cells and B cells is also inhibited by T ________ cells.
What will be an ideal response?
In Drosophila melanogaster there is a sex-linked gene for eye color that is found only on the X
chromosome. The allele for red eye color (Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You see only redeyed females present, but you see both red-eyed and white-eyed males present. The genotypes of the parents were
a. Xw+Xw+; Xw+Y. b. XwXw; Xw+Y. c. Xw+Xw; XwY. d. Xw+Xw; Xw+Y. e. XwXw; XwY.
Why does natural selection favor organisms that are benthic in estuaries? a. Changes in salinity
b. The constant movement of water. c. Changes in temperature. d. The high amount of nutrients.