Which of the following statements concerning spermatogenesis and oogenesis is incorrect?
a. One primary spermatocyte or one primary oocyte containing 46 chromosomes respectively yields two spermatozoa or two ova, each containing 23 chromosomes.
b. There is a continual supply of spermatogonia through mitotic activity.
c. The first meiotic division involved in oogenesis is completed just prior to ovulation.
d. It takes anywhere from about 11 to 50 years for the process of oogenesis to be completed.
e. During oogenesis, there is unequal distribution of cytoplasm resulting in the production of polar bodies that disintegrate.
A
You might also like to view...
A woman undergoes coronary bypass surgery, in which a blood vessel from her leg is moved to her heart, where it supplements the blood supply following a heart attack. This procedure is a(n)
A. allograft. B. isograft. C. xenograft. D. autograft.
Cycliophorans have two types of larvae. One type of larva is produced when the digestive system of a female is impregnated by a male. The digestive system then collapses and develops into a larva, which swims away in search of a new host after the surrounding female dies. Which is the embryonic tissue that is apparently most important in forming this type of larva?
What is the path of blood flow from the heart to the lung tissues and back to the heart?
A. Left ventricle > aorta > brachiocephalic artery > lung tissues > bronchial veins > brachiocephalic vein > superior vena cava > right atrium B. Right ventricle > pulmonary trunk > pulmonary arteries > lung tissues > pulmonary veins > left atrium C. Right ventricle > brachiocephalic arteries > lung tissues > brachiocephalic veins > inferior vena cava > left atrium D. Left ventricle > aorta > bronchial arteries > lung tissues > bronchial veins > azygos vein > superior vena cava > right atrium
Describe the mechanism that permits the penis to become erect.
What will be an ideal response?