Hybrid zones are typically ____, presumably because the hybrid organisms are not well adapted for either parental
environment.
a. rare
b. narrow
c. expansive
d. experimental
e. restricted to few biomes
b
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Which feature of Archaea is shared with Eukarya but not with Bacteria?
a. the sequestration of DNA into a nucleus b. the common occurrence of introns c. the chemical structure of the cell walls d. the plasma membrane structure e. a genome comprised of a single, circular molecule of DNA
Menstruation begins in response to ____
a. rising levels of FSH and LH b. rising levels of GnRH c. rising levels of progesterone d. falling levels of progesterone e. rising levels of estrogen
The use of heat lessens the amount of time needed to disinfect or sterilize medical instruments
Indicate whether the statement is true or false
A recessive allele: Check all that apply.
A. will never have an effect on an organism's phenotype. B. will have no noticeable effects on an organism's phenotype if a dominant allele is present. C. will have an effect on an organism's phenotype if the individual is homozygous for the recessive allele. D. can be on either the maternal or the paternal chromosome.