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An organism that cannot make its own food.


An organism that makes its own food


Control center of the cell


the basic structural and functional unit of all organisms


Made of a single cell


Consisting of many cells


A living thing


A change in an organism's surroundings that causes the organism to react


A reaction to a stimulus.

spontanous generation

the mistaken idea that living things can arise from nonliving sources


Process by which organisms maintain a relatively stable internal environment.

manipulated variable

Factor in an experiment that a scientist purposely changes; also known as independent variable

responding variable

The factor that may change in response to the manipulated variable

controle group

what the exparamental goup is being compared to

experimental group

A subject or group of subjects in an experiment that is exposed to the factor or condition being tested.

needs of living things

Water, food, living space, and stable internal conditions

6 characteristics of living things

chemicals of life,
energy use,
response to surroundings,
growth and development,

experimental design

A design in which researchers manipulate an independent variable and measure a dependent variable to determine a cause-and-effect relationship


eukaryotes tha cannot be classified by animals,plants or fungi

red tied

these are algal blooms that occur in salt water(diatoms)


anchor seaweed bodies to rocks


A reproductive cell with a hard, protective coating


A chemical that produces color


Grow in soil, on trees and on the bodies of turtles and frogs; smallest of all green plants


(genetics) any event that changes genetic structure


A close relationship between two species that benefits at least one of the species.


A long, whip-like filament that helps in cell motility. Many bacteria are flagellated, and sperm are flagellated.

contractile vacuole

saclike organelles that expand to collect excess water and contract to squeeze the water out of the cell


Animal-like protist


A temporary, foot-like extension of a cell, used for locomotion or engulfing food


Hairlike projections that extend from the plasma membrane and are used for locomotion

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