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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

A painful muscle spasm that doesn't immediately release is a(n)

a. inflammation. b. muscle tear. c. cramp. d. isotonic contraction. e. dystrophy.

Biology & Microbiology

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

Biology & Microbiology