Which of these substances does not come from petroleum? a. coal b. asphalt c. plastics d. gasoline

Which of the following is the most likely result of converting forestland to urban development? a.the amount of land available for lumber production decreases. b.fewer trees are needed because cities are made mainly of concrete. c.people discover more efficient ways to grow trees. d. the price of lumber goes down.

In order to clone adult animals, scientists typically begin with a(n)

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry