Which is not true concerning Sertoli cells?
a. They secrete hormones.
b. They are joined by tight junctions.
c. They form a blood-testis barrier.
d. They phagocytize discarded sperm cytoplasm.
e. They facilitate the movement of sperm into the blood.
E
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Most commonly, individuals of a population show a ________ distribution through their habitat
Fill in the blank(s) with correct word
In females, LH promotes the monthly development of the egg and FSH causes release of the egg from the ovary
Indicate whether the statement is true or false
Which are characteristics that distinguish mammals from other vertebrates? Check all that apply.
_____ hair _____ endothermy _____ specialized teeth _____ enlarged skull _____ mammary glands
Which of the following terms is NOT related to the other four?
a. amino acids b. nucleotides c. 5-carbon sugars d. phosphate groups e. nitrogen-containing bases