Which of the following are unique characteristics or components of the adaptive—but not innate—immune system? Select all correct choices
A. immune memory
B. opsonization
C. natural killer cells
D. phagocytosis
E. specificity
A,E
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The response to touch by such plants as the sensitive plant is due to:
A. changes in water content of cells B. changes in electrical impulses at the touched area C. auxin displacement in the touched area D. effect of gibberellins on the area affected E. sensitive responder cells
The concept of uniformitarianism, articulated by James Hutton in the late 1700s, states that ________
A) the genetic code is similar among all living and extinct species B) mutations accumulate at a constant rate in most organisms C) current geological processes on Earth operate in the same manner as those that operated in the past D) the rate of extinction has been constant throughout the time life has existed on Earth
A visitor to an American tropical forest will probably never get to see a jaguar, the largest native cat species in the Americas, but will see many plant-eating monkeys
Use your knowledge of energy pyramids to explain the rarity of the predatory cats.
When calculating a molecule's Svedberg coefficient, the rate of sedimentation is affected by the molecule's ________
A) size B) mass C) shape D) size and shape E) mass, size, and shape