There are organisms at each level as you move up an energy pyramid. Only energy is available to the next level in a food chain.

A food web is more than a food chain.

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

True or false: the breakup of pangea resulted in warm wet global climates?