SAS-Midterm 1 review

SAS-Midterm 1 review - all the reviews are sorted by lecture

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-Lecture 1- (Scientific Method) Research: Curiosity driven : Basic- asks why. Mission Oriented : Are mushrooms damaging…- More $$$. Acquisition of Knowledge: Indirect : Reading, listening. Direct : Observation, experimentation. The Scientific Method: 1. Observation: Observable fact. 2. Hypothesis: Testable. 3. Experiment: Controlled and replicated. 4. Interpretation of results: Extrapolation (going beyond direct experience). 5. Others repeat work. Peer/independent Review: Required for publication of scientific results so you can get an objective evaluation. Epidemiological evidence : Evidence used when you can’t experiment on people. Ask questions like “what do they have in common?”. Theory : A consistent explanation supported by many facts. *Science gives you levels of confidence, not a final truth*. -Lecture 2- (Intro to Fungi) Mycology : Study of fungi 100,000 identified species. 1.5 million total species. Fungi Characteristics: Have no motility/movement (plants). Have cell walls (plants). Not photosynthetic (animals). Not autotrophic (animals). Heterotrophic : Require organic nutrients like sugars and amino acids (animals). Osmotrophic : Food absorbers; digest food outside their body. (neither) Have their own kingdom, but closer to animals.
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Starts as a singularity. Fungal spore: Recipe to make a particular fungus; dormant. Hyphae : Filaments that are the body of the fungus. Mycelium : Network of hyphae. The form in which fungi exist in nature. Cannot be used to identify the species. Functions of Hyphae: Nutrient acquisition. Secretes enzymes which digest food. Absorbs products of digestion. Penetrates substrate because fungi grow in things they decompose (bacteria can’t). Trophic Growth: Nutrient acquisition and growth are linked (fungus need nutrients to grow). Uniquely associated with mycelium’s mode of growth. Yeast: Fungi that have no mycelium. Single celled. Grow by budding- Asexual. Stay on wet areas, can’t penetrate. -Lecture 3- Fruiting Bodies: Used to identify species. Spore producers (20 million/minute). Function of Spores: Reproduction. Dispersal: 1. Passive: Dispersal by wind (greater opportunity and risk, most fungi use it) or attachment to insects (less risk and opportunity) which take it to substrate 2. Active: Forcible ejection (all gilled mushrooms). Once it is ejected it is then dispersed by wind. Survival: Formed under conditions hostile to growth (lack of water, low temp,
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SAS-Midterm 1 review - all the reviews are sorted by lecture

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