Quizlet

Flashcards: Biology - Ch. 2

Instructions

  1. Print this webpage. If you can, set your printer to Grayscale for faster printing.
  2. Fold each page down the middle along the solid vertical line.
  3. Cut along the dotted horizontal lines.
  4. Optional: Use tape, glue, or staples to hold the two sides of each flashcard together.

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abiotic factornonliving parts of an organism's environment: air currents, temperature, moisture, light and soil are examples
biological communitya community made up of interacting populations in a certain area at a certain time
biosphereportion of Earth that supports life; extends from high in the atmosphere to the bottom of the oceans
biotic factorall the living organisms that inhabit an environment
commensalismsymbiotic relationship in which one species benefits and the other species is neither harmed nor benefited
ecologyscientific study of interactions between organisms and their environment
ecosysteminteractions among populations in a community: the community's physical surroundings, or abiotic factors
habitatplace where an organism lives out its life
mutualisma symbiotic relationship in which both species benefit
nicherole or position a species has in its environment; includes all biotic and abiotic interactions as an animal meets its needs for survival and reproduction
parasitismsymbiotic relationship in which one organism benefits at the expense of another, usually another species
populationgroup of organisms all of the same species which interbreed and live in the same place at the same time
symbiosispermanent, close association between two or more organisms of different species
autotrophorganisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
biomassthe total mass or weight of all living matter in a given area
decomposerorganisms, such as fungi and bacteria, that break down and absorb nutrients from dead organisms
food chainsimple model that shows how matter and energy move through an eccosystem
food webmodel that shows all the possible feeding relationships at each trophic level in a community
heterotrophorganisms that cannot make their own food and must feed on other organisms for energy and nutrients
trophic levelorganism that represents a feeding step in the movement of energy and materials through an ecosystem