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The study of relationships between organisms and between organisms and their environment
The environment in which a species normally lives
A group of organisms with similar characteristics, which can interbreed and produce fertile offspring.
A group of organisms of the same species, who live in the same area at the same time.
A group of populations living together and interacting with each other in an area
A community and its abiotic environment
Organisms move into an area from elsewhere
Organisms move out of the area to live elsewhere
The maximum population size that can be supported by the environment
An organism that can synthesise its own organic molecules from simple inorganic substances (all plants)
An organism that obtains organic molecules from other organisms ( fungi, animals)
An organism that ingests organic matter that is living or recently killed (lion)
An organism that ingests dead organic matter (earthworm, dung beetles)
An organism that lives on or in dead organic matter, secreting enzymes into it and absorbing the products of digestion (bacteria and fungi)
The position of an organism in the food chain
No clear symmetry, attached to a surface, pores through body, no mouth or anus. sponges.
radially symmetric, tentacles, stinging cells, mouth but no anus. jellyfish, corals, sea anemones
Bilaterally symmetric, unsegmented, flat bodies, mouth but no anus. planaria, tapeworms, liverflukes.
Bilaterally symmetric, segmented, bristles often present, mouth and anus. earthworms, leeches, ragworms.
muscular foot and mantle, usually shell, segmentation not visible, mouth and anus. slugs, snails, clams, squids.
bilaterally symmetric, exoskeleton, jointed appendages, segmented. insects, spiders, crabs, millipedes.