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Biology Definitions
General descriptions of biology terms
29
Biology
4th Grade
01/07/2010

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Term
adaptation
Definition
The changes of an organism to become more suited to an environment.
Term
camouflage
Definition
Adaptation that enables species to blend with their surroundings; allows a species to avoid detection by predators.
Term
carnivore
Definition
An animal or plant that mainly eats meat.
Term
community
Definition
A group of organisms or a population of different species occupying a particular area.
Term
consumer
Definition
An organism that generally obtains food by feeding on other organisms.
Term
decomposer
Definition
An organism whose ecological function involves the recycling of nutrients, such as bacteria or fungi.
Term
diversity
Definition
The number and variety of species in an area.
Term
ecosystem
Definition
A system that includes all living organisms in an area and how they interact.
Term
endangered
Definition
A species in danger of becoming extinct.
Term
energy pyramid
Definition
A model that is shaped like a pyramid to show how the energy flows through a food chain.
Term
environment
Definition
The external surroundings with which an organism interacts.
Term
extinct
Definition
A species that is no longer in existence.
Term
food chain
Definition
A food chain shows how each living thing gets food, and how nutrients and energy are passed from creature to creature.
Term
food web
Definition
Interconnected or a group of related food chains.
Term
habitat
Definition
Place where an organism or a population normally lives.
Term
herbivore
Definition
Any animal that feeds chiefly on grass and other plants.
Term
host
Definition
An organism that is infected by a parasitic organism.
Term
interact
Definition
How organisms behave and relate to each other.
Term
mimicry
Definition
Copying other animals or natural objects as a form of protection.
Term
nutrients
Definition
A nutritious substance, food or a component of food.
Term
omnivore
Definition
An animal that feeds on both plants and animals to survive.
Term
organism
Definition
An individual living thing.
Term
parasite
Definition
An organism that obtains nourishment and shelter on another organism.
Term
population
Definition
The number of organisms of one species that live in the same place.
Term
predator
Definition
An organism that preys upon other organisms.
Term
prey
Definition
An organism that is hunted.
Term
producer
Definition
An organism capable of producing food through the process of photosynthesis.
Term
scavenger
Definition
An animal that eats carcasses abandoned by predators.
Term
species
Definition
A group of organisms having common characteristics.
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