The circulatory system of mammals has a chambered heart.
a. two
b. three
c. four
d. one

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

The arrows indicate the direction of wind flow. which place experiences monsoons?

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?