In the book entitled,On the Origin of Species by Means of Natural Selection, ____ proposed that natural mechanisms
produce and transform the diversity of life on Earth.
a. Alfred Russel Wallace
b. Charles Lyell
c. Charles Darwin
d. Joseph Hooker
e. Charles Darwin and Alfred Russel Wallace
ANSWER: c
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Which of the following systems is the only one to have direct interactions with the other three?
a. digestive b. urinary c. circulatory d. respiratory e. reproductive
Psychrophiles would be expected to grow
a. in hot springs b. on the human body c. at refrigeration temperatures d. at low pH
An experimental forest ecosystem is enclosed in a sealed greenhouse. The entire ecosystem, including the air and soil, is treated with an extremely potent fungicide that kills all fungal life stages including spores. What will probably happen next?
A) Tree growth will increase because the dead fungi will act as a fertilizer. B) Plants will enjoy a long-term increase in growth and survival because of the removal of fungal pathogens. C) Dead organic matter will accumulate on the forest floor; plant growth will decline because of a lack of nutrients and the loss of mycorrhizal partners. D) A few animals will go extinct due to loss of their fungal food sources, but otherwise the forest will be largely unchanged.
What membrane is infected in meningitis?
A. lining of the heart B. lining of the brain and spinal cord C. lining of the lungs D. lining of the digestive tract E. lining of the reproductive tract