The water cycle consists of some water evaporating from the surfaces of bodies of water and going into the air. as result of air temperatures, water vapor eventually condenses and falls as rain. the rain nurtures life and the environment and eventually makes its way back into water where the cycle is repeated. water has an unusually low vapor pressure and does not rapidly evaporate because of its a) neutral ph. b) liquid form. c) hydrogen bonding. d) non-polar structure.

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

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Contrast how pollination is different among gymnosperms and angiosperms.