<span>power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.</span>
The correct answer is A. Petroleum is not a raw material for the production of biofuels. From the name itself, biofuels are obtained from biomass. Biomass are organic materials for example are the choices given in B, C and D.
I feel the producers are the most important, because if they collapse, soon the plant eaters will collapse, then the animals that eat them, and so on.
You could also say A scavenger is the most imporant because without them we wouldnt be ŕecycling´ food.
D) would be the best answer.
Answer:Human diploid cells
Explanation: Human diploid cells have 46 chromosomes (the somatic number, 2n) and human haploid gametes (egg and sperm) have 23 chromosomes (n). Retroviruses that contain two copies of their RNA genome in each viral particle are also said to be diploid.