Why has the spread of the herbicide-resistant hydrilla through florida’s waterways resulted in them no longer being navigable by most boats?

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

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

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?