Sperm are formed directly from the maturation of ____
a. sperm mother cells
b. spermatids
c. spermatogonia
d. primary spermatocytes
e. secondary spermatocytes
ANSWER: b
You might also like to view...
Bronchial washing collected with a double lumen–plugged catheter is:
a. acceptable. b. not acceptable.
To preserve epigenetic memory in the daughter cells, the cell retains these "old" proteins during DNA replication
What will be an ideal response?
Dark Field Microscopy
A. uses light beams that are deflected by a different thickness of the object and are reflected when they strike the objective B. is used to observe viruses and the internal structure of thinly sectioned cells C. is used to observe a specimen that emits light when illuminated with an ultraviolet light D. is used primarily to view spirochetes
About 180 liters of blood plasma is filtered into human nephrons per day and, of that amount, about 2-3 liters leaves the body as urine. Therefore, the percentage of plasma filtrate that leaves as urine each day is about ________.
A. 0.1-0.2 percent B. 0.5-1.0 percent C. 1-2 percent D. 5-10 percent E. 10-20 percent F. 20-50 percent