Fertilization occurs when the
A. sperm cells enter the vagina.
B. oocyte is implanted in the uterus.
C. oocyte ruptures from the ovary.
D. sperm cell head enters the zygote.
E. nuclei of the secondary oocyte and the sperm cell unite.
Answer: E
You might also like to view...
Glomerular filtration
a. occurs in the loop of Henle. b. is the process by which plasma water, electrolytes, and small molecules, which enter Bowman's capsule, are separated from blood cells and protein, which remain in the glomerular capillaries. c. is the process by which a substance is transported from the tubular fluid to the peritubular capillaries. d. both (a) and (b) above. e. none of these answers.
____________________ are composed of two or more types of primary tissue organized to perform a particular function or functions
Fill in the blank(s) with correct word
The femur is connected to the acetabulum by a series of strong ____
a. ligaments b. epithelium c. sutures d. synarthroses
The ____________________ cells of the thyroid gland secrete the iodine-containing hormones ____________________ and ____________________, whereas the ____________________ cells of the thyroid secrete the Ca2+-regulating hormone ____________________
Fill in the blank(s) with correct word