Essment
understand main ideas
1. main 2. summarize the three types of biodiversity.
3. generalize why maintaining biodiversity has a direct economic value to
humans.
4. differentiate between the direct and indirect economic value of biodiversity.
5. evaluate and discuss the importance of maintaining biodiversity for
future medical needs.
think critically
for the de m ont of a building proiect in

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle