Disease, competition, and predation.
Answer: The open ocean zone lies beyond the continental slope and contains 65% of the water in the oceans. This zone is divided further into three subzones. The sunlit zone is where photosynthesis takes place. Plankton and jellyfish are drifters that inhabit this zone.
Explanation:
Chloroplasts are organelles specialized for photosynthesis. Animals do not photosynthesize; therefore, they do not need chloroplasts.
