Which of the following is NOT a membrane-disrupting toxin?
A) A-B toxin
B) hemolysin
C) leukocidin
D) streptolysin O
E) streptolysin S
A
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In the following pedigree, the indicated trait is most likely caused by which type of allele?
A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked
Most animals on land have __________ fertilization; gametes meet in a female's body. Fill in the blank(s) with the appropriate word(s)
Which organism can have more then one nucleus per cell?
A. Animals B. fungi C. protozoa D. B & C only E. A, B, & C
A powerful way to demonstrate that observed differences between a treatment group and a control group truly reflects the effect of the treatment is for researchers to:
A) get their study published in a scientific journal. B) use a variety of statistical tests until they find one that shows statistical significance. C) conduct the experiment over and over again. D) make more observations. E) formulate as many hypotheses as possible.