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2 Ecology terms week 3&4
symbiotic relationship terms+
20
Science
7th Grade
10/14/2014

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Term
symbiosis
Definition
relationships in which two organisms interact and are affected; at least one organism benefits in the association.
Term
mutualism
Definition
a symbiotic relationship in which both organisms benefit from the interaction.
Term
commensalism
Definition
a symbiotic relationship in which one organism benefits and the other organism is not harmed or helped by the interaction.
Term
parasitism
Definition
a symbiotic relationship in which one organism benefits and the organism is harmed and may die from the interaction.
Term
energy pyramid
Definition
a diagram that shows the amount of energy that moves from one feeding level to another in a food chain or web.
Term
population
Definition
all the members of one species in a particular area interacting with each other
Term
limiting factor
Definition
an environmental condition that prevents a population from increasing
Term
carrying capacity
Definition
the largest population a geographical area can support with the available resources
Term
Competition
Definition
the struggle between organisms to survive as they attempt to use the same limited resource
Term
Predation
Definition
a relationship between two organisms where one is hunting and killing the other for a food source
Term
energy pyramid--sentence
Definition
The most energy is available at the producer level of the pyramid. As you move up the pyramid, each level has less energy available than the level below. This is an ____________________.
Term
mutualism--sentence
Definition
The relationship between a crocodile and a plover bird that removes pieces of meat from the crocodile's mouth is an example of ________________.
Term
parasitism--sentence
Definition
Mistletoe sends roots into an an oak tree draining the tree of its nutrients; this is an example of ______________.
Term
commensalism--sentence
Definition
When birds follow a herd of elephants and eat the insects that were hidden in the grass is an example of ____________.
Term
symbiosis--sentence
Definition
The relationships which are considered ____________, at least one organism gets something it needs.
Term
competition--sentence
Definition
______________ happens between consumers when they fight over the same food source.
Term
carrying capacity--sentence
Definition
When a population reaches a level where new member cannot be supported due to lack of resources, the area has reached its ________________________.
Term
population--sentence
Definition
In nature, a ____________ of animal species may increase or decrease because of the availability of resources.
Term
limiting factor--sentence
Definition
A drought is an example of a ___________. This is a condition that keeps the population of frogs from increasing.
Term
predation--sentence
Definition
A snapping turtle in a pond hunts and eats a small perch. This interaction is an example of ________________.
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