BIOL 111 Lecture Notes - Lecture 49: Choanoflagellate, Mesohyl, Motility

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: Richard Roy

Document Summary

Biol 111 organismal biology clone of parent grows off of parent and then falls off sexual reproduction o hermaphroditic. Does not imply self fertilization sperm and eggs develop inside single cells. Broadcast sperm sperm is sent out a sponge filters in different sperm through its ostia, its egg is fertilized and develops in the mesohyl larvae are released and are motile. When they find a suitable environment, larvae will settle down and become sessile. Evolutionary innovations sponges need to evolve the following to become more complex and diverse animals: o gut enables extracellular digestion, and the digestion of larger prey o tissues enable body organization. Process forming many cells from one cell o gastrulation in-folding. The gastrula layers of embryonic cells are called germ layers ectoderm outer germ layer o develops into epidermis and nervous system endoderm inner germ layer o develops into lining of digestive and respiratory systems.