BIOG 1440 Lecture Notes - Lecture 8: Gastrovascular Cavity, Monogastric, Salivary Gland

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Announcement: prelim #1 is in two weeks in class (3/7/2018) Nutrition, nutrients, and energy: nutrition: set of processes by which organisms obtain and use nutrients required for maintaining life, autotrophs (photoautotroph/chemoautotroph) Primary producers : nutrition consists on acquiring non-organic compounds, no need for organic carbon source, depend on other organisms for noncarbon nutrients, chemoautotroph examples: archae/bacteria. Photoheterotroph: dieting--what do they need to acquire, autotrophic diet, does not mean autonomous, requires essential chemical elements and energy. Plant diet: energy source=light, water, co2, minerals, heterotrophic diet, requires chemical energy, organic building blocks for macromolecules. Animal diet: water, carbs, proteins, lipids, vitamins. Anions (nitrate, for example) are readily available to plants b/c not bound to soil particles: cations adhere to soil particles. Released by cation exchange: root system, exchange surface and mycorrhizae, absorption is function of surface a major problem is to increase absorption surface. Similar with our digestive tract: root system consists in an an arborization.

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