Which of the following organisms produces the toxin associated with St. Anthony's Fire (ergotism)?
A. Aspergillus nidulans
B. Stachybotrys chartarum
C. Amanita phalloides
D. Claviceps purpurea
Answer: D
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When acetylcholine stimulates the opening of ligand-gated ion channels on a postsynaptic cell, what is this event called?
A. neuromuscular junction B. temporal summation C. inhibitory postsynaptic potential (IPSP) D. excitatory postsynaptic potential (EPSP) E. synaptic integration
Respond to statements 91–95 in reference to the five kinds of
species interactions listed below. a. competition b. parasitoidism c. mutualism d. commensalism e. parasitism E 91. The relationship between a dog and a wood tick is this. M 92. The interaction between a human and the intestinal bacterium E. coli is usually this. M 93. The interaction between two closely related species of woodpeckers that live in a temperate forest is likely to be this. M 94. If a wasp lays its eggs inside the larva of a fly, the interaction is this. M 95. When a tropical bird places its nest in association with a wasp nest on the same tree, the interaction is this.
A painful muscle spasm that doesn't immediately release is a(n)
a. inflammation. b. muscle tear. c. cramp. d. isotonic contraction. e. dystrophy.
In a species where females typically mate with multiple males
A. there is no competition between males B. males likely compete indirectly with each other through sperm competition for successful fertilization of a female's eggs C. males likely compete directly with each other for the opportunity to male with a female D. males may have elaborate penis morphologies or large ejaculate volumes E. females may have the ability to preferentially use sperm from a specific male