the __ is the gonad and the __ is the gamete
Fill in the blank(s) with the appropriate word(s).
testis; sperm
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If an organism has 12 chromosomes in its gametes, how many chromosomes would be found in a fertilized cell made by this organism?
a. 12 b. 18 c. 24 d. 36
Select the correct pair of statements about FSH and LH function.
A. In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum. B. In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles. C. In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum. D. In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.
Boundaries offer unique habitats
A) that offer relatively easy access to adjacent communities. B) that do not offer easy access to adjacent communities. C) that support only species specially adapted to the boundary environment. D) whose composition is almost exactly the same as adjacent communities.
The force necessary to cause microtubules of cilia and flagella to slide alongside one another is
provided through the action of __________ proteins, which derive the energy to perform their work directly from __________ molecules. a. kinesin; ADP b. kinesin; glucose c. tubulin; ATP d. dynein; ATP e. dynein; ADP