Within the country of indonesia, the island of sumatra has tigers and rhinos, while to the east, the island of sulawesi has cockatoos and tree kangaroos. what is the best explanation for this observation? a. the climates on the two islands are very different, allowing some species to survive, and others not. b. some species can migrate between islands and others cannotc. animals in sumatra evolved independently, while those in sulawesi came from australia. d. animals in sumatra came from asia, while those in sulawesi came from australia. e. animals in sumatra and sulawesi both came from asia, but those in sulawesi migrated farther.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Diagram of the evolution of land plants?