Radula modification allowed all of the following functions in gastropods except
A. eating vegetation.
B. boring holes in other mollusk shells.
C. injecting poison through a harpoon-like structure.
D. protecting themselves with nematocysts.
E. scraping algae off rocks.
Answer: D
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Ammonia is likely to be the primary nitrogenous waste in living conditions that include _____
A) lots of fresh water flowing across the gills of a fish B) lots of seawater, such as a bird living in a marine environment C) lots of seawater, such as a marine mammal (for example, a polar bear) D) a terrestrial environment, such as that supporting crickets E) a moist system of burrows, such as those of naked mole rats
The reactants for cellular respiration are
A. carbon dioxide and glucose. B. glucose and ATP. C. oxygen and ATP. D. glucose and oxygen. E. water and ATP.
Tariff protection
a. encourages the optimum use of scarce resources. b. has no impact on use of scarce resources. c. prevents the optimum use of scarce resources. d. eliminates the scarcity of resources.
In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and genetic diversity. B. species diversity and genetic diversity. C. ecosystem diversity and species richness. D. species diversity and ecosystem function.