BIO 181 Lecture Notes - Lecture 13: Herbaceous Plant, Dinobryon, Scale-Invariant Feature Transform
10 Nov 2015
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True heterotrophs: chemoheterotrophs: adaptations for feeding: prokaryotes. Saprobes: decomposers that absorb nutrients from dead organisms: parasites: absorb nutrients from the body fluids of living hosts. Specialists: organisms with very specific nutritional requirements: generalists: organisms with non-specific nutritional requirements, almost any organic molecule, including petroleum, can serve as food for at least some species. Synthetic compounds that cannot be broken down by bacteria are said to be non-biodegradable: obligate aerobes- must use oxygen, facultative aerobes- can use oxygen, but it is not necessary. Instead, use fermentation or use other molecules as metabolism: obligate anaerobes- poisoned by oxygen. Some bacteria: aerotolerant anaerobes- can tolerate oxygen, but do not use it. The nodule is formed as a bacterial relationship with roots (nitrogen-fixing bacteria: autotrophic, mixotrophs switch between auto- and heterotroph depending on the bacteria. Topic 11: portions of ch-28-35 (follow lecture notes mainly) Lecture guide: fluid feeders: suck nutrient-rich fluids, if from a host, characterized as parasites.
