Pfiesteria piscicida is a toxic algal form that is associated with neurological disease symptoms.
a. true
b. false
Ans: a. true
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Profuse watery diarrhea (i.e., "rice water stools"), leading to dramatic fluid loss, severe dehydration, and hypotension that frequently leads to death, is the hallmark of which toxin activ-ity?
a. Cholera toxin (CT) b. Enteric endotoxin c. Shiga toxin d. Toxin A
Which of the following is involved in the prevention of polyspermy?
A. acrosome of the sperm B. fusion of the sperm and egg nucleus C. depolarization of the egg's plasma membrane D. changes within the corona radiata E. the number of chromosomes contained within the sperm
What is myelin?
What will be an ideal response?
The primary polysaccharides associated with the plant cell wall are the
A) hemicelluloses. B) extensins. C) fibronectins. D) pectins. E) both choices A and D