BIOL10004 Lecture 15: Module 5 Ecology_-animals-in-their-environment-Diversity
Document Summary
Asexual reproduction- new individuals arise from a single parent by mitotic cell division and are genetically identical to that parent. Allows a single individual to produce a colony. Budding- development of a new individual from outgrowths of the body wall of the parent. Common strategy among invertebrates but also some vertebrates. Regeneration- if an individual is divided into two or more pieces, each bit can regrow what it"s missing. Advantageous for animals living in constant, stable environments. Occurs through the use of ova and the female reproductive system. A process in which an egg develops without being fertilised. -without sperm. Unfertilized egg becomes activated and develops, initiated by mitosis of haploid egg nucleus, not followed by cytokinesis, 2 nuclei produce then fuse to form a diploid nucleus and the egg develops as if it had been fertilised. Facultative parthenogenesis use asexual or sexual reproduction depending on the environment, food resources and mate availability. Common strategy among both invertebrates and vertebrates.
