In order for migration to alter allele frequencies in another population:
A) the gene pool of the migrating population must be different from the population it is joining.
B) a large portion of the population must leave as new individuals arrive.
C) the gene pools of the populations involved must be very similar.
D) a large portion of the population must die off.
Answer: A
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Which of the following sequence of events of fertilization is in the proper order?
A. acrosomal reaction, binding of sperm to egg membrane, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy B. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, slow block to polyspermy, and then an increase in egg cytosolic calcium C. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy D. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, increase in egg cytosolic calcium, and then the slow block to polyspermy E. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, slow block to polyspermy, and then an increase in egg cytosolic calcium
During the luteal phase, a __________ forms from
cells that surrounded the egg. Fill in the blank(s) with the appropriate word(s).
Why is water considered a polar molecule?
A) The oxygen atom is found between the two hydrogen atoms. B) The oxygen atom attracts the hydrogen atoms. C) The oxygen end of the molecule has a slight negative charge, and the hydrogen end has a slight positive charge. D) Both hydrogen atoms are at one end of the molecule, and the oxygen atom is at the other end.
Downstream processing includes all the following exceptÂ
A. packaging. B. recovery. C. growth of the microorganism. D. purification. E. Downstream processing includes all of the processes above.