Spiders are predators that will eat just about any animal they can subdue. A spider that feeds
on crickets is thus a __________.
a. specialist and tertiary consumer
b. generalist and tertiary producer
c. specialist and secondary consumer
d. generalist and secondary producer
C
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Sulfur dioxide released by coal-burning power plants contributes to _____
a. ozone destruction b. sea level rise c. acid rain d. desertification
A hummingbird that pollinates morning glory
flowers and nests in the crotch of an apple tree. The apple tree is not harmed or helped by the hummingbird. The relationship between the hummingbird and the apple tree is a
a. mutualism. b. commensalism. c. competition. d. parasitism. e. predation
Who originally discovered the process of bacterial transformation?
A. Watson and Crick B. Chargaff C. Griffith D. Meselson and Stahl E. Hershey and Chase
Koch's Postulates for identifying a pathogen require all of the following EXCEPT
A) re-inoculation and production of disease. B) sequencing the DNA of the suspect organism. C) isolating an organism from a diseased host. D) culturing an organism in pure form.