An asteroid impact on Earth is often associated with the formation of ____
a. large floods
b. erupting volcanoes
c. magnetized rock
d. fossils
e. shocked quartz
ANSWER: e
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The letter "C" in the accompanying figure represents which teeth?
a. incisors b. molars c. canines d. premolars e. grinders
An ecologist studying productivity in a sample of grasses measures gross primary productivity as 1000 kcal/m2/yr and autotrophic respiration as 100 kcal/m2/yr. Based on these calculations, the net primary productivity would be
A) 10 kcal/m2/yr. B) 900 kcal/m2/yr. C) 1100 kcal/m2/yr. D) 10,000 kcal/m2/yr.
Why was the pea plant an ideal plant for Mendel to use?
A. simple traits that are easy to identify B. low numbers of offspring produced C. generation time that is several years D. expensive and time-consuming to grow E. All of the answers are correct.
Sexually transmitted chlamydia is similar to infection with Yersinia pestis in that they both can produce
A) urethritis. B) pelvic inflammatory disease in females. C) conjunctivitis. D) buboes. E) pneumonia.