Which hormone stimulates the secretion of estrogen and stimulates sperm production?
A. LH
B. Androgens
C. FSH
D. Testosterone
Answer: C
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HCG is secreted by the ovary
Indicate whether the statement is true or false.
Insects prevent water loss and disturbance in the osmotic balance in cells by
a. having a water-proof cell wall around each cell. b. having a cuticle that makes the body water-proof. c. having an outer epidermis made of keratinized cells. d. having equal concentration of molecules in ECF and ICF.
Which of these structures is part of the system that produces and drains tears?
a. conjunctiva b. tarsal gland c. palpebrae d. lacrimal gland
A mutation is
A. always harmful to health. B. always beneficial to health. C. a change in a DNA sequence in less than 1% of a population that affects anatomy and/or physiology. D. a common genetic variant.