Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n) ________
A. conclusion.
B. hypothesis.
C. theory.
D. experiment.
E. data set.
Answer: B
Biology & Microbiology
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For every six CO2 molecules fixed, how many triose phosphates are exported from the chloroplast?
A. 12 B. 10 C. 6 D. 2 E. 1
Biology & Microbiology
The movement of alleles among populations is
called
a. a bottle neck. b. mutation. c. a founder effect. d. gene flow. e. genetic drift
Biology & Microbiology
A plant secretes ____ when it needs to respond defensively to a pathogen
a. salicylic acid b. systemin c. brassinosteroids d. mineralocorticoids e. nitric oxide
Biology & Microbiology
A biologist from the United States Forest Service estimated the population of guppies in a pond to be 30,000 per cubic meter. This is also known as the
A. population density. B. density-dependent factor. C. natality. D. None of these answers is true.
Biology & Microbiology