Excitatory synapses cause hyperpolarization of post-synaptic cells.
a. true
b. false
Answer: b. false
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Adaptive radiation is demonstrated by ____
a. the dinosaurs going extinct b. coelecanths remaining similar over hundreds of millions of years c. the evolution of mammals after dinosaurs went extinct d. rats and resistance to warfarin e. warbler body mass and survival
The study of the causes and ecological consequences of spatial patterns on the landscape is called ________
Fill in the blank(s) with correct word
Antigens are
A) specific molecules, or parts of molecules, that the body recognizes as foreign. B) proteins the body produces against invading substances. C) cells that protect the body against invaders. D) proteins on the surface of our cells to which pathogens attach. E) enzymes secreted to destroy a pathogen's cell wall.
Which of the following statements about M protein is FALSE?
A) It is found on Streptococcus pyogenes. B) It is found on fimbriae. C) It is heat- and acid-resistant. D) It is readily digested by phagocytes. E) It is a protein.