A single litterbag with poplar leaf litter has been placed on the forest floor at Coweeta. This bag was harvested and arthropods extracted from it. The sample contains mainly springtails, oribatid mites, predatory mesostigmatid mites, pseudoscorpions, and small spiders. At which stage of decomposition is the leaf litter in this litterbag when it was harvested? a. Fresh
b. Early
c. Mid
d. Late

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

Nucleic acid certain protein cell membranes certain carbohydrates

Any sound above what db can cause hearing loss in human beings