Every one should know something about this tree and the oil that it produces. This site gives detailed information about almost every aspect of this tree. Echinodermata are all marine animals, living on the seashore and sea bottom. Starfishes are a good example. Echinodermata have great powers of regenerating lost body parts.
Sexes are separate.
This site discusses the biology of various types of echinodermata clearly. A short historical fossil record is also available. Ever since James Watson and Francis Crick put forward a possible DNA structure in 1953, the whole of genetics changed dramatically. This site explains the molecular replication of DNA and also has links to many related topics. The moon is about 384,000 km away from the earth.