Which is TRUE regarding meiosis in a single germ cell?
A. It results in 4 cells with 23 pairs of chromosomes each.
B. It results in 4 cells with 46 chromosomes each.
C. It results in 4 cells with 23 chromosomes each.
D. It results in 2 cells with 46 chromosomes each.
E. It results in 4 cells with 46 pairs of chromosomes each.
Answer: C
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A) movements of white blood cells out of the circulation. B) filling of red blood cells with hemoglobin. C) the formation of platelets from megakaryocytes. D) squeezing of red blood cells through narrow capillaries.
Which layer of skin is LEAST protected by melanin?
A) stratum spinosum B) stratum granulosum C) stratum corneum D) stratum basale
In males, the primary genitalia are the ________.
A. epididymides B. ureters C. seminal vesicles D. testes
What happens when two or more overlapping action potentials are "added" together within a muscle?
a. twitch fatigue b. twitch summation c. contraction addition d. contraction paralysis e. sarcoplasmic reduction