Populations
A section, group, or type of organisms living in a certain area.
What is a trophic level?
A group of species in an ecosystem that share the same food chain.
What is a food chain?
Hierarchical series of organisms each dependent on the next source of food.
What is biodiversity?
Number of different organisms
What is an organism that hunts for other organisms?
Predators
Fill in the blank: Birth rate is the number of species born in ____ year?
One
What is on the first level?
Primary producers
What do the arrows in a food chain show?
Shows the movement of energy and nutrients
What is an ecosystem?
A biological community of interacting organisms and their physical environment
What is parasitism?
When a species moves out of an area, what is it called?
Emigration
What is the job of the decomposers?
Break down dead plants or animals and turn them into nutrients.
How do food chains become food webs
all of the interconnected and overlapping food chains in an ecosystem
What are all organisms living in a particular area known as?
Commuinty
Ants and acacia trees have a mutualistic relationship because...
They both benefit from living off each other
What is the closed population?
Only affected by birth rate and death rate.
Define omnivores
An animal that eats both plants and animals origin.
what is at the top of every food chain?
Apex predators
What is a species
A group of living organisms consisting of the capability of exchanging genes or interbreeding.
Define symbiosis
Interaction between two different organisms living in close physical association.
What is carrying capacity?
A maximum number of individuals that an ecosystem can sustain?
10% of energy is passed on from one level to the next, what happens to the 90%
The rest gets lost into heat
Describe the difference between food chain and food web
a food chain outlines who eats whom. A food web shows all the food chains in a ecosystem.
What is the most common type of ecosystem
Marine ecosystems
What is the word for when two organisms seek similar food or prey?
Neutralism