Most of our early knowledge about the brain came from: A. naturalistic observation of primates. B. naturalistic observation of children in different cultures. C. case studies of brain damaged individuals. D. case studies of normal individuals.
Coral reef definition: A coral reef is a long narrow mass of coral and other substances, the top of which is... | Meaning, pronunciation, translations and examples English Dictionary | Thesaurus | Translator | Grammar | Scrabble | Blog
Corals are marine organisms of class Anthozoa (Kingdom Animalia, Phylum Cnidaria, Class Anthozoa) that typically live in large colonies of identical individuals. They are important reef builders in tropical seas, and are secretors of calcium carbonate (CaCO3) that forms their hard skeleton.nthozoans do not have a medusa stage in their development as do other cnidarians. Rather, they release sperm and eggs that form a planula that attaches to a surface on which they grow. A coral head contains thousands of genetically identical polyps, each typically a few millimeters in diameter.