There are 4 thing that need to happen for natural selection to occur:
1) reproduction
2)heredity
3)variation in fitness or organisms
4)variation in individual characters of the population.
All of the above are correct.
Explanation:
Frequency Range
1 Radio waves >0.1m <3×10
9
㎐
2 Micro waves 0.1m−1㎜ 3×10
9
to 3×10
11
㎐
3 Infrared 1㎜ to 7000A° 3×10
11
to 4.3×10
17
㎐
4 Visible light 7000 to 4000A° 4.3×10
14
㎐ to 7.5to10
14
㎐
5 Ultraviolet 4000A° to 10A° 7.5×10
17
to 3×10
17
㎐
6 X-Rays 10A° to 0.01A° 3×10
17
to 3×10
20
㎐
7 Gamma Rays <0.01A° >3×10
20
㎐
Answer:
(a.) rabbit eating grass.
Explanation:
Heterotrophs obtain energy by eating plants and animals. Plants are autotrophs, absorbing the sun's energy through photosynthesis and making glucose.
The answer is D, serving as a primary source of energy for the body.
