BIO120H1 Chapter Notes - Chapter 5: Chemosynthesis, Kinetic Energy, Chemical Energy
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
Toolmaking crows: a case study: humans employ tools to enhance our ability to gather food to meet our energy needs, families of birds (corvids) used food-collecting tools manufactured from plants. Introduction: energy is most basic requirement for all organisms, organisms acquire energy for demands of cellular maintenance, growth, reproduction and survival. Detrivores: organisms that consume non-living organic matter (e. g. earthworms, fungi) Parasites/herbivores: feed on other living organisms but don"t kill them. Predators: capture and kill their food source (prey) Holoparasites: plants that have lost their photosynthetic function and are heterotrophs (e. g. dodder uses haustoria to take up carbohydrates from host plant) Hemiparasites: photosynthetic but receive some energy, nutrients, and water from host plants: some can act as autotrophs. Photosynthetic capacity is acquired by consuming photosynthetic organisms or by living with them in close relationship (symbiosis) ingest organisms that have chloroplasts and maintain them for energy (e. g. sea slugs). Organisms oxidize (gain electrons) from inorganic substrate.
