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Questions and Answers List

Question	Answer
Tiny pores through which carbon dioxide enters the plant from the air	Stomata
Open and close stomata in response to the amount of water and light the plant receives.	Guard Cells
Is the loss of water from plant leaves.	Transpiration
Includes all living and nonliving things in an environment.	Ecosystem
Includes all members of a single species in an area at a given time	Population
Includes all the living things in an ecosystem	ommunity
Network of food chains that have some links in common.	Food Web
living thing that hunts and kills other living things for food .	Predators
Organisms that are eaten by predators.	Preys
Is a diagram that shows the amount of energy available at each level of an ecosystem.	Energy Pyramid
The fight for limited resources	Competition
Is the physical place where an organism lives and hunts for food .	Habitat
Is the special role that an organism plays in a community	Niche
Is a relationship between two or more kinds of organisms that lasts over time.	Symbiosis
A symbiotic relationship that benefits both organisms .	Mutualism
A symbiotic relationship that benefits one organism without harming the other .	Commensalism
A symbiotic relationship where one organism benefits and the other is harmed.	Parasitism