What are hormones?
A. They are chemicals transported in the blood that affect target cells throughout the body.
B. They are chemicals transported in the blood that affect all cells similarly.
C. They are chemicals that affect cells right next to where they are produced.
D. They are carbohydrates on the surface of red blood cells that affect targeted cells throughout the body.
Answer: A
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A culture technique that encourages the growth of specific microbes while inhibiting the growth of others is a(n) ________ culture.
Fill in the blank(s) with the appropriate word(s).
How do spheroplasts and protosplasts differ?
A. Spheroplasts retain the peptidoglycan but protoplasts do not. B. Spheroplasts retain their outer membrane but protoplasts do not. C. Spheroplasts form from cocci and protoplasts form from bacilli. D. There is no difference; these terms are synonyms.
Which of the following is considered to be a hunger peptide?
(a) neuropeptide Y (b) glucagon (c) bombesin (d) somatostatin
What major advantage is conveyed by having a system of adaptive immunity?
A) It enables a rapid defense against an antigen that has been previously encountered. B) It enables an animal to counter most pathogens almost instantly the first time they are encountered. C) It results in effector cells with specificity for a large number of antigens. D) It allows for the destruction of antibodies.