where was African Jaw Tumor discovered?
What will be an ideal response?
West Africa.
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Why can't a female lizard have both high fecundity and high survival?
A) In only rare cases, lizards have both high fecundity and high survival. B) Female lizards are able to produce only one set of offspring. C) Competition for resources prevents this. D) The more energy the female devotes to offspring, the less that can be devoted to her survival. E) The female is already maximizing the number of eggs she lays, and if she attempts to nest later in the season, there will not be enough food for her young.
Which of the following involves a subjective judgment?
a. A fact b. A theory c. An hypothesis d. An opinion e. A control
Which of the following statements about transformation is false?
A. The bacterium E. coli is incapable of natural transformation. B. Like transduction and conjugation, natural transformation is an "accident" of plasmid biology. C. Artificial transformation is essential to many recombinant DNA techniques. D. All R-plasmids contain antibiotic-resistance genes. E. Natural transformation of the Enterobacteriaceae is a significant public health risk.
In the case of temperature regulation, integration is accomplished by
a. a receptor in the brain. b. a center in the brain. c. muscles and glands. d. none of the above.