A living thing

a tiny particle that can reproduce only inside the cells of living things

tiny one-celled organisms, some of which can cause diseases

the basic unit of a living organism

the cell part that controls the cell's activities

jellylike material that fills most of a cell

a stiff outer layer that helps keep plant cells firm

the green cell part in plant cells that traps and uses light energy

to arrange in groups using a system

the largest group into which an organism is classified

a group of similar species

an animal that does not have a backbone

an animal with a backbone

all the living and nonliving parts in an area

the study of relationships among living and nonliving parts of an area

the place where a species lives

the role of a species in an ecosystem

all of the members of one species that live in the same area

all the populations living together in one area

the process by which plants use sunlight to make sugar from water and carbon dioxide

An organism that uses sunlight to make sugar from water and carbon dioxide

an organism that consumes other organisms for food

an animal that only eats other animals

an animal that only eats plants

an animal that eats both other animals and plants

an animal that feeds on the bodies of dead organisms

an organism that helps to break down and decay dead organisms and the wastes of living organisms 

a diagram that compares the amount of energy available at each position, or level, in the feeding order

a combination of all food chains in a community