Biology chapters 1, 2, 6 and 7

All molecules must contain.

• carbon

• elements

• atoms

• hydrogen

A geographic área that has the same major forms of life is

• a community

• a biome

• a population

• an ecosystem

Green plants are responsible for the increase in _____________ in the environment over time.

• species

• sulfur

• oxygen

• ecosystems

Only multicellular organisms contain

• organs

• cells

• energy

• traits

A condition to which an organism can react is called

• a trait

• an adaptation

• an environment

• a stimulus

a variable is

• a proposed answer to a scientific question

• the factor tested in an experiment

• a scientific explanation of known facts

• an established scientific truth

The test of a hypothesis is

• an experiment

• a conclusion

• a theory

• a principle

The belief that fish were produced by mud at the bottoms of rivers and lakes is an example of

• biogenesis

• science

• abiogenesis

• scientific theory

Experiments conducted by Pasteur disproved

• scientific principle

• active principles

• biogenesis

• abiogenesis

The S-shape in Pasteur's bottle captured

• microorganisms

• maggots

• fish eggs

• mice