Question 8(Multiple Choice Worth 3 points) (03.02 MC) The characteristics of two layers of Earth’s crust are listed. Layer A: Consists of the lithosphere Layer B: All living things live on this layer Which statement is true? Layer A is the crust and Layer B is the mantle. Layer A is the mantle and Layer B is the crust. Layer A is the outer core and Layer B is the inner core. Layer A is the inner core and Layer B is the outer core.

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

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12

Which could be a pathway of food through an ecosystem