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What instrument or tool, allowed scientists to see parts of plants and animals they could not see before?

What is the smallest living part of any living thing.

example of single-celled creature:

The ______ of a cell is its control center.

Surrounding the nucleus is a jellylike fluid as well as structures that help the cell live and grow. Together these are known as ________.

A cell has a thin covering that holds it together called a _______.

A plant cell also has a _______, while animal doesn't have.

What does the cytoplasm surround?

• a cell

• nucleus

• cell wall

• cell membrance

Which part of a cell is a jellylike fluid?

• nucleus

• cell membrane

• cell wall

• cytoplasm

A ____ is a group of cells all doing the same kind of work