Cell Theory

Cell theory was developed

• by a single scientist

• on accident

• in a single day

• by many scientist

________ contributed to the development of cell theory.

• Hooke

• Leeuwenhoek

• Schleiden

• all of the above

All of the following belong to cell theory EXCEPT:

• All living things are made of cells.

• Cells cannot reproduce.

• Cells come from other cells.

• Cells are the basic unit of life.

Nutrients and oxygen enter cells through the:

• cell membrane

• mitochondria

• robosomes

• nucleus

The brain of a large animal is like the ____ of a cell.

• cytoplasm

• nucleus

• mitochondira

• cell membrane

Cells store substances in which organelles?

• mitochondria

• ribosomes

• vacuoles

• chloroplasts

Organelles in cells are like _____ in large organisms.

• vacuoles

• organs

• cells

• chemicals

Photosynthesis takes places in which organelles?

• pseudopods

• mitochondira

• chloroplasts

• ribosomes

The simplest structures that can carry out all of the activities characteristic of life are:

• cells

• atoms

• molecules

• crystals

Cells can only come from:

• minerals

• water

• carbohydrates

• other cells