BIO 1130 Study Guide - Midterm Guide: Detritivore, Viviparity, Ovoviviparity

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Also display nuclear dimorphism, micronucleus set aside for meiotic reproduction. Feeding: specialized cilia help create water current that brings food toward cytostome. Movement: pseudopods ( fluid endoplasm being pushed forward by myosin motors crawling on polymerizing acting fibers. Once the endoplasm hit the hyaline cap it will polymerize into a gel-like ectoplasm. At back end the ectoplasm is being turned into endoplasm. Cytoplasmic flow mainly due to actin/myosin with some dynein/kinesin help. Type ii myosin motors create attachments between actin fibers, squeezing cytoskeleton and creating cytoplasmic streaming. Reproduction: nuclear fusion or mitosis to create fruiting bodies or cysts. Cephalized w/ an anterior brain that coordinates input from eye spots and auricles (chemoreceptors), to 2 nerve cords that run along body. Feeding: single opening on ventral side that picks up particulate matter, also excretes waste from mouth. Feeding: circular muscles form 2 valves in pharynx, an anterior and posterior valve. Necessary to swallow food since there is constant hydrostatic pressure.