In which organel does photosynthesis occur

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

In which of the following relationships is one organism always benefited while the other organism is always harmed