Chemical dyes are used to increase resolution of objects.
Answer the following statement true (T) or false (F)
False
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Ovulation is triggered by
a. high levels of LH. b. low levels of LH. c. low levels of estrogen. d. high levels of estrogen. e. high levels of progesterone
Water can diffuse directly across lipid bilayers, but ions cannot. What aids the ions in water in entering or exiting a
cell? a. transport proteins in a cell’s cytoplasm b. transport proteins in a cell’s plasma membrane c. sugars produced in source regions d. organic compounds stored in plant tissues e. companion cells
Individuals in the population grouped according to levels of maturity define the population's ____
a. carrying capacity b. age structure c. density d. size e. birth rate
Genetics studies of human populations have revealed that
A) it is nearly impossible to determine the relatedness of human populations. B) Homo sapiens probably did not evolve from primates. C) humans have very little genetic variation compared to other mammals. D) all humans are virtually identical. E) human populations vary tremendously at the level of DNA sequences.