How do plankton participate in the oxygen cycle

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells

What type of competition exsist between two species. turtles and fish

Explain why ecosystem diversity results in species diversity in a healthy biosphere