Spermatids are produced by:
A) secondary spermatocytes. B) spermatogonia.
C) sertiary spermatocytes. D) primary spermatocytes.
Answer: A
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In one strand of DNA, the nucleotide sequence is 5'-A-T-G-C-3'. The complementary sequence in the other strand must be
A) 5'-A-T-G-C-3'. B) 3'-T-A-C-G-5'. C) 3'-G-C-A-T-5'. D) 5'-C-G-T-A-3'.
In placental organisms, the ________ of the embryo merges with the endometrial lining of the uterus to form the placenta
A) blastopore B) chorion C) amnion D) yolk sac E) allantois
If adults of reproductive age are having just enough children to replace themselves, then the population is said to have ________ fertility
Fill in the blank(s) with correct word
In the microscope, you observe multinucleated amoeboid cells with sporangia that form spores. This is a(n)
A) ascomycete. B) cellular slime mold. C) Euglenozoa. D) tapeworm. E) plasmodial slime mold.