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Week 10 - Ecology (Grade 7-Science)
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Why are Predator-prey interactions important?
keep animal populations at a healthy level.
List 3 types of consumers (animals)
herbivores, omnivores and carnivores
Who is the predator in these relationships? (Snake and mouse)
Snake
Who is the predator in these relationships? (Seal and shark)
Shark
Who is the predator in these relationships? (Wolf and moose)
Wolf
one organism catches and eats another organism.
predator-prey interactions
symbiotic interaction where one organism lives on or in side another organism causing it harm.
Parasitism
a symbiotic interaction where both organisms benefits from the relationship.
Mutualism
a symbiotic interaction where one organism benefits and the other is unaffected.
Commensalism
List 3 types of symbiotic interactions
Commensalism, Mutualism, Parasitism
How many types of symbiotic interactions are there?
3 types of symbiotic interactions
any type of CLOSE INTERACTION between two different organisms.
Symbiosis interaction
What do plants compete for?
Light • Water• Minerals• Root space
What do animals compete for?
Food• Water • Space to live • Mates
an interaction between organisms which both need a resource that is in limited supply.
Competition
List 3 types of interactions
Competition, Symbiosis, Predator Prey
How many types of interactions are there?
3 types of interactions
When interactions happen between organisms from different species, we call.....
interspecific interactions.
If the organisms that are interacting are from the same species, we call ..........
intraspecific interactions.
In ecology, the effect that a pair of organisms have on each other is called.....
interaction
What kind of pyramid shows the total dry mass of the organisms at each trophic level.
Pyramid of Biomass
Why is energy lost in each trophic level?
Movement• Respiration• Heat loss• Growth• Excretion• Not all material consumed• Not all material digested
pyramid shows the amount of useful energy that enters each trophic level.
An energy pyramid
What kind of pyramid shows the number of organism in each trophic level.
pyramid of number
List 3 types of ecological pyramids
pyramids of numbers, biomass, and energy
List the names for the different trophic levels?
Producer -> Primary consumer-> Secondary consumer->Tertiary consumer
What do we call the levels in a food chain
trophic level
What show which organisms eat other organisms
Food chain
An interaction where one animal catches and eats another animal.
Predator-prey
Any type of a close and long-term biological interaction between two different organisms.
Symbiosis
A struggle between two organisms for the same resources within an environment.
Competition
Occurs between individuals of the same species.
Intraspecific
Occurs between different species.
Interspecific
A graphical representation showing the relationship between different organisms in an ecosystem.
Ecological pyramids
A sequence of transfers of matter and energy in the form of food from organism to organism
food chain
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