Which organelles must be present within a cell of a generanium leaf for respiration and photosynthesis to occur?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

What is the similarities and differences between bacteria and eukaryote?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?