Scleractinia

Sixty genera of coral have a symbiotic relationship with the algae zooxanthellae. Only some deep water and cold water corals can survive without them. This symbiotic relationship benefits both organisms, the zooxanthellae provides the coral with glycerol, glucose and alanine. The coral provides the zooxanthellae with nitrogen and protection against predators. The degree to which the organisms depend on one another varies between species. (Rupert and Barnes, 1994). Coral bleaching occurs when the…

1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA) The Precambrian period was also known as the Hadean and the reason why it was not solid yet was that the planets of the solar system were just starting to form and they were not even solid rocks yet they were just starting to form from dust particles. 2. What was this particular time period called? This particular period was called the…