The graph shows a population of rats in a forest habitat over a 10-year period.
The forest was a controlled environment, and no rats were allowed to enter or
leave the habitat.
Population
250
225
1200
200
175
150
Number of Rats (in thousands)
125
4100
100
90
76
75
50
30
45
30
25
27
0+
2
6
78
9
10
5
Year
Based on the graph, at which point is the death rate most likely greater than
the birthrate?
O A. Between years 3 and 4
B. Between years 4 and 5
C. Between years 8 and 9
D. Between years 6 and 7

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

How can an organ, such as the lungs, work for multiple body systems?

Speed is the ratio of the distance of an object moves to