Cells and Organisms

Cells are the building blocks of:

• living things

• matter

• energy

• rocks

An organism that can only be seen with a microscope.

• organ

• bacteria

• microorganism

• tissue

Cells do which of the following?

• respire
• take in nutrients
• produce wastes
• all of the above

In biology, the word cell describes

• the basic unit of organization of living things
• the largest unit of organization of living things
• small rooms
• none of the above

cells come in many shapes and sizes

• true

• false

any living thing is called

• an organism

• a muscle

• a plant

Single celled organisms are called

• unicellular

• multicellular

• bicellular

• tricellular

Which of the following statements is part of the cell theory?

• All living things are made up of one or more cells.

• Cells are the basic units of living things.

• All cells come from pre-existing cells.

• All of these

Which best explains why humans are multicellular organisms?

• Human cells are too small to function alone.
• Human cells join together to form one large cell.
• Humans need many cells to carry out life processes.
• Humans have many systems that perform the same function.

All bacteria are

• unicellular
• multicellular
• eukaryotic