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bio 3
bio
| Question | Answer |
|---|---|
| Ecology | scientific study of interactions among organisms and between organisms and their envirnment, or surroundings |
| levels of organization | organism, population, community, ecosystem, biome, biosphere |
| biome | a group of ecosystems that have the same climate and dominant communities |
| spieces | a group of organisms so similar to one another that they can breed and produce fertile offspring |
| autotroph(producer) | use energy from the environment to fuel the assembly of simple inorganic compounds. ex: plants, some algae, certain bacteria |
| photosynthesis | when autotrophs use light energy from the sun to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches |
| chemo-synthesis | when organisms use chemical energy t produce carbohydrates |
| heterotroph(consumer) | organisms that rely on other organisms for their energy and food supply. ex: herbivores, carnivores, omnivores, detriitvores, decomposers |
| herbivore | eat plants |
| carnivore | eat animals |
| omnivore | eat plants and animals |
| detritivores | eat plant and animal remains and other dead matter, collectively called detritus |
| decomposers | break down organic matter |
| food chain | a series of steps in which organisms transfer energy by eating and being eaten |
| food web | when the feeding relationships among the various organisms in an ecosystem form a network of complex interactions |
| cellular respiration | when organisms obtain energy from organic molecules |
| trophic levels | each step in a food chain or food web |
| ecological pyramid | shows the relative amonts of energy available at each trophic level. |
| biogeochemical cycle | elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through these cycles |
| limiting nutrient | when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly |
| algal bloom | when an aquatic ecosystem receives a large input of a limiting nutrient |
Created by:
elinormaster
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