What is the ultimate energy for all life on earth

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Nucleic acids offer variability because they contain alternate forms of genes called .