a relationship in which both organisms benefit from the relationship.
What is mutualism
100
autotrophic, first level of trophic level, plants
What is producers
100
must have a host cell to accomphish most of its life functions
What is a viruses
100
most help in digestion, are used to make food such as yogurt and cheese
What is bacteria
100
a measure of the tatal dry mass of the organisms in an ecosystem
What is biomass
200
a relationship in which one organism benefits and the other is killed or consumed.
What is predation
200
heterotrophic, anything that eat first and second level of trophic pyramid
What is consumers
200
grains-->rabbits-->hawks
What is a food chain
200
viruses have what kind of shape
What is geometric
200
an environmental factor that prevents a population from increasing past a certain point is called a
What is limiting factor
300
a relationship in which one organism benefits and the other is neither harmed nor helped
What is commensalism
300
usually fungi, or bacteria; help with breakdown of organisms
What are decomposers
300
eat only plants
What are herbivore
300
AIDS & acne
What are examples of a viruse and bacteria
300
the maxium population of a species that can be supported by an ecosystem over a given period of time is called
What is carrying capacity
400
the organism that is killed or consumed by a predator
What is prey
400
flow of energy from producers to third level consumers
What is trophic levels
400
eat only meat
What are carnivores
400
survival of the fittest
What is natural selection
400
to absorb water and minerals and anchor a plant firmly in the ground
What are roots
500
a relationship in which one organism benefits and the other is harmed or causes death.
What is parasitism
500
eat both meat and plants
What are omnivores
500
complex network formed by feeding relationships among various organisms
What is a food web
500
characteristics that increase the chances of survival
What is adaptation
500
the world's major communities, classified according to the predominant vegetation and characterized by adaptations of organism to that particular environment.