BIOL-208 Lecture Notes - Lecture 12: Commensalism, Mycorrhiza, Parasitism
6 Dec 2017
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Parasitism : 2 species where 1 bene ts o of the other and there is an e ect on the host. Mutualism : both species bene t from the interact (host and paratie will have an increase in growth , survival and reproduction ) Explain factors a ecting the virulence and transmission of parasites and how host defences alter the interaction between predator and prey. explain how predation (parasitism) can mediate coexistence of competitors. Provide examples of mutualism and its importance to life. Defensive association facultative example : ant and acacia (ant provides protection ; acacia provides nutrition ) Increase pollination obligate example : yucca moth and yucca plant ( yucca moth needs the plant to complete life cycle ; yucca plant needs the moth to pollinate it ) Explain the varied interactions between plants and mycorrhizae. Mycorrhizae provides nutrients and feeds on roots of plants. Plants with mycorrhizae are better able to extract water.
