BIOL1007 Lecture Notes - Lecture 20: Natural Selection, Fecundity, Motility
Document Summary
Lecture 20 groups and populations same species in deined geographical are". Can be social (pos or neg), indirect (sharing common resource) or accidental (random chance) Play certain role in understanding of factors that shape and drive diversity of life. Populations; composiion and structure will be inluenced by life history, mobility and habitat. Land and water sessile (immobile) and moile (mobile) Modular oragnisms include corals, hydra sp. (cnidarian), worms. Addition of modules tends to lead to a branched form. Removal of modules may harm an organism but not kill it. Natural cloning arises when a genet fragments and the ramets establish into physiologically independent parts. Understand temporal dynamics of populaions e. g links beteween cat species and hares up and down where predator eats more prey and eaing down resoources. Understand spaial distribuion of pops e. g eucalyptus. Natural selecion occurs within pops e. g depends on variaion of species. Pops change in num over ime- can be posiive or negaive.