The hydrologic cycle is different from other nutrient cycles in that
A) the atmosphere is involved.
B) water is not recycled, but flows one way through ecosystems.
C) the biotic part of the cycle plays only a small role.
D) the soil is not involved.
E) the ocean is involved.
C
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Which of the following represents
xenotransplantation?
a. cows resistant to mad cow disease b. goats that produce spider silk c. corn with Bt genes d. pigs carrying human livers e. more than one of these represents xenotransplantation
Why are viruses not considered to be alive? What will be an ideal response?
Which of the following is an example of migration?
A) frogs leaving a pond after metamorphosis B) hawks finding a new territory after maturing C) seeds dispersing from a tree D) humpback whales traveling up and down the coast of western United States
Ergot, a fungus, contains a hallucinogenic drug that binds to serotonin receptors. The natural drug is most similar to ________
A) mescaline B) methamphetamine C) LSD D) morphine