TRH is a type of ________ hormone secreted by the ________
A) steroid; thyroid gland
B) releasing; hypothalamus
C) peptide; thymus
D) releasing; anterior pituitary
Answer: B
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The synthesis of ________, a component of Gram-negative bacterial outer membranes, is complex because it requires understanding both carbohydrate and lipid biosynthesis pathways.
What will be an ideal response?
Archaea were first found ____
a. to be pathogenic b. living on the surface of leaves c. in surface ocean water d. in extreme environments e. in benign environments
Each cell is able to maintain a constant internal
environment. This condition is called a. metabolism. b. homeostasis. c. physiology. d. adaptation. e. evolution
The benefits of many pesticides are often short-lived, and their amounts must be increased for continued effectiveness because:
A) they react with their own breakdown products. B) they select for evolution of resistance in target organisms. C) they interact with other pesticides already in use. D) they interact with various fertilizers applied to the same fields.