Hematopoietic stem cells
A) are the precursor of new blood cells.
B) are maintained in the bone marrow.
C) proliferate and differentiate into red blood cells, white blood cells, and platelets.
D) are all of the above.
Ans: D) are all of the above.
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How are acrosomal proteins released?
a. The most soluble acrosomal proteins are released first; bound acrosomal proteins are released second.
b. Bound acrosomal proteins are released first; soluble acrosomal proteins are released second. c. Acrosomal proteins are released in one phase. d. Acrosomal proteins are released after the zona pellucida is penetrated. e. Acrosomal proteins are released as the sperm travels through the female reproductive tract before reaching the egg.
Linked genes
A. are alleles that are found in different daughter cells. B. have no alleles. C. have more alleles than usual. D. are found on the same chromosome. E. are found in the same species.
Which of the following plants would have a seed?
a) angiosperm b) gymnosperm c) nonvascular plant d) both gymnosperm and angiosperm
9th week until birth
What will be an ideal response?