Because, photoautotrophs serves as their carbon sources.
Chemoheterotrophic bacteria are those bacteria that are incapable of producing their own food, they depend on photoautotrophs, which are capable of making their own food by trapping energy from the sun. Thus, photoautotrophs serves as source of food for the chemoheterotrophic bacteria.
The sequence of B) nucleotides in a DNA molecule determines the protein that will be produced.
This seems rather vague, the question is most likely referring to parasitic relationships.<span />
The most accurate answer is C.
The cytoskeleton is responsible for cell shape, motility (movement) and motility of organelles within a cell.
Unlike the human skeleton , the cytoskeleton is extremely dynamic, meaning the filaments that make up the cytoskeleton are able to shorten or lengthen very rapidly.
This dynamic nature is necessary for cells to be able to change shape, complete cell division, or migrate (move from one place to another).The cytoskeleton connects to every organelle and every part of the cell membrane.