I'm pretty sure the answer is B. Invest in alternative energy sources that do not burn fossil fuels. The reason I would pick B is because in Antarctica the ice is melting more and more over time because, cars and factors etc are burning fuels which result in more damage to the ozone layer.
Yes, for all organisms, the major function of DNA is store and be utilized for the encoding of specific gene sequences onto further RNA molecules which will later on be used for synthesizing of essential polypeptides needed for all living beings, anything that is composed of 1 or more cells.
I believe your best answer would be the third option, both sexually and asexually. Some types of algae reproduce asexually due to the division of one cell into two or even more brand new cells that are genetically similar to the parent cell. However, other types of algae participate in sexual multi-cell reproductive cycles.
I hope this has answered your question and I do apologise if I am wrong. Good luck on your assignment :)
Answer:
building proteins storing energy providing structure to cell walls carrying genetic information building proteins. storing energy. providing structure to cell walls.