A food chain has only one link for producers but many links for consumers. 1. True 2. False

What is evolution? what are the pieces of evidence scientists use to study evolution?

What best describes the association between the carbon cycle, plants, and animals? Plants fix carbon and release oxygen, and animals release carbon and use oxygen. Animals fix carbon and release oxygen, and plants release carbon and use oxygen.

Wind and water energy are both indirect forms of what other type of energy source

Explain how the fern sporophyte is dependent upon the gametophyte

When examining the hierarchy of life, which of the following terms is most inclusive? a. ecosystem b. biosphere c. population d. species

1. How are structure and function related? 2. How are matter and energy related?

What symbol indicates the cardinal directions

Within each eon, identify major events and the types of life that dominated the Earth during the time.

Which product of combustion contributes most to the greenhouse effect?

Why can't astronomers measure the parallax of a star that is a million light years away?