Section 1

The History of Cell Biology

• All living things are made up of one or more cells. Robert • All living things are made of organized parts, obtain

Hooke discovered cells. Anton van Leeuwenhoek was the first to observe living cells.

• The cell theory states all living organisms are made of one or more cells, cells are the basic units of structure and function, and cells come only from pre-existing cells.

Vocabulary cell (p. 69)

energy from their surroundings, perform chemical reactions, change with time, respond to their environment, and reproduce.

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