Question

1. what are corals? (2pts)

Explanation:

Corals are marine invertebrates within the class Anthozoa of phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. Corals secrete calcium carbonate to form hard exoskeletons that support and protect their soft bodies. Some corals have a symbiotic relationship with photosynthetic algae called zooxanthellae, which live in their tissues. The algae provide the coral with food through photosynthesis, while the coral provides the algae with a protected environment and nutrients.

Answer:

Corals are marine invertebrates (class Anthozoa, phylum Cnidaria) that live in colonies. They secrete calcium carbonate exoskeletons and often have a symbiotic relationship with zooxanthellae algae.