Mutation causes change in an organisms DNA, resulting in a change in all aspects of the organisms life. It affects how the organism looks, and how it behaves. If there was no mutation, an organism could not change, therefore there wouldn't be evolution at all.
The work done is 137 joules.
Lifting opposes the acceleration of gravity, which is 9.8 m/sec/sec.
20 x 0.7 x 9.8 = 137 J (kg-m2/sec2)
That is correct. Only 3 will be lit.
Answer: To have enough DNA for each gamete, the DNA in the germ cell must be <u>Doubled (x2).</u>
Hope this helps!