bio regents

What does the nucleus do?

Stores DNA and controls the cell.

What does the cell membrane do?

Controls what enters and leaves the cell.

What do mitochondria do?

release energy from food

what is dna

The genetic material that contains instructions for traits.

What is a gene?

A section of DNA that controls a trait.

What is photosynthesis?

Plants use sunlight, water, and carbon dioxide to make food (glucose).

What does photosynthesis produce?

glucose (food) and oxygen

What is cellular respiration?

Cells break down glucose with oxygen to release energy.

Why do organisms need food?

to get energy for life processes

What is homeostasis?

Keeping internal conditions stable.

Give an example of homeostasis.

sweating when hot

what is an adaptation

A trait that helps an organism survive.

what is natural selection

Organisms with helpful traits survive and reproduce more.

What is a producer?

An organism that makes its own food (like plants).

What is a consumer?

An organism that eats other organisms.

What is a decomposer?

An organism that breaks down dead matter (fungi and bacteria).

Where does most energy in ecosystems come from?

the sun

What is biodiversity?

The variety of living things in an ecosystem.

What is a stimulus?

a change that causes a response

what is a response

a reaction to a stimulus

what is a hypothesis

an educated prediction that can be tested

What is the independent variable?

the variable the scientist changes

dependent variable

the variable that’s measured

Which process removes carbon dioxide from the air?

photosynthesis

Which process releases energy for cells?

cellular respiration

where is dna found?

in the nucleus

What do all living things need to survive?

energy

Photosynthesis=?

plant makes food

Cellular Respiration=?

cell releases energy