Fire ants, Solenopsis invicta, ________
a. have no natural enemies
b. disrupt natural communities when introduced
c. have a sting that is usually fatal
d. are native to the United States
b
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Listeriosis is diagnosed from ________ cultures and treated with ________
A) sputum / intravenous antibiotics B) blood or spinal fluid / hydration therapy C) sputum / hydration therapy D) blood or spinal fluid / intravenous antibiotics
Archaeopteris, the first known tree, had what characteristics?
_____ It occurred in forests. _____ It possessed wood. _____ It reproduced by seeds. _____ It had a eustele. _____ It had a vascular cambium.
Which of the following statements about predation are true? Check all that apply.
_____ Cycling of predator and prey populations is not commonly observed. _____ Removal of a predator often leads to increased community stability. _____ Animal predation on plants is called herbivory. _____ Predation can induce coevolutionary changes in prey species. _____ Batesian mimicry is not a coevolutionary adaptation to predation.
Which of the following is NOT true of DNA-binding proteins?
a. Many are dimers that combine with two sites on the DNA. b. Regulatory proteins often bind inverted repeats on DNA. c. A leucine zipper is a common domain to maintain proper conformation. d. Most bind to DNA in a nonspecific manner.