If you plant your potatoes in late August, while it is still hot, you may still have them in the cooler months after. Cool weather doesn't really harm potatoes, they can still grow then, it is only when it is frosty that potatoes die off. The foliage will die, but the potatoes will remain securely underground until you are ready to dig them out. Additionally, potatoes can be grown indoors so that you can always have them.
Answer: creating an ozone layer to shield life from UV rays
Cynobacteria or blue green algae is the strain of bacteria, which was able to produce oxygen in the primitive earth as a result of photosynthesis. The abundance of oxygen in the atmosphere formed the ozone layer in the upper atmospheric layers, these layers are protective enough to provide a shield against the harmful UV radiations incident on earth coming from the sun.
DNA stores and transports information.
2, because a theory is not a law that can not be changed, and new evidence can change a theory.
