Answer: The current predicted doubling time is 61years which makes 50years in your option the nearest possible answer.
Explanation:The world's current (overall as well as natural) growth rate is about 1.14%, representing a doubling time of 61 years.
We can expect the world's population of 6.5 billion to become 13 billion by 2067 if current growth continues.
2.
22. A student wants to test the effect of temperature on relative enzyme activity. The table below shows
.
data from this experiment.
Temperature (*)
30
40
50
60
70
80
90
100
Relative Enzyme Activity (%)
After 10 minutes After 20 minutes
17
20
34
40
42
50
71
75
85
95
34
44
13
18
9
10
After 30 minutes
19
38
48
73
90
40
15
9
I
What are the independent and dependent variables in this experiment?
A. Independent-relative enzyme activity:
dependent--number of minutes
B. independent--number of minutes;
dependent--relative enzyme activity
C. Independent-relative enzyme activity:
dependent--temperature
D. Independent-temperature;
dependent-relative enzyme activity
