The initial size of a population _____________ affect the carrying capacity of the environment
a. does not
b. does
a
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In humans, blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked recessive trait. A woman with blue eyes and normal color vision whose father was color blind marries a man who also has normal color vision
He has brown eyes, but his mother had blue eyes. Which of the following would you expect to be true for their sons? A) One-half of their sons will have normal color vision and brown eyes; 1/2 of their sons will have normal color vision and blue eyes. B) Their sons will all have normal color vision and brown eyes. C) One-fourth of their sons will be color blind and have blue eyes, 1/4 of their sons will be color blind and have brown eyes, 1/4 of their sons will have normal color vision and blue eyes, 1/4 of their sons will have normal color vision and brown eyes. D) Their sons will all have normal color vision and blue eyes. E) One-half of their sons will be color blind and have blue eyes; 1/2 their sons will be color blind and have brown eyes.
One way in which an archaean would differ from a bacterium is that the archaean would possess no:
A) DNA in its chromosome. B) peptidoglycan in its cell walls. C) ribosomes in its cytoplasm. D) RNA in its ribosomes.
Dynamic assembly and disassembly of a cytoplasmic microtubule in a cell occurs primarily at its plus end, because its minus end is usually anchored to
A) a basal body. B) a centromere. C) a microtubule organizing center. D) a mitochondrial outer membrane. E) the plasma membrane.
If you could take a time machine back to the Carboniferous period, which of the following would you most likely encounter?
a. Creeping mats of low-growing bryophytes b Fields of tall grasses swaying in the wind c. Swampy forests dominated by tree lycophytes, horsetails, and ferns d. Huge forests of naked-seed trees filling the air with pollen e. The dominance of flowering plants