The Cell

An individual form of life that uses energy to carry out the activities of life is a(n) ______.

• organ

• organism

• organelle

Which of the following is NOT a characteristic of living organisms?

• The ability to grow and develop.

• The ability to respond to its environment.

• The ability to breathe oxygen.

A cell is the smallest unit that can ______.

• be seen with the naked eye

• perform the basic activities of life

• spontaneously generate

Which of the following is something an organism needs in order to carry out its basic activities?

• A place to live and grow.

• Chemicals such as oxygen, carbon dioxide, nitrogen, and water to help with growth and reproduction.

• Energy, either from the sun or by eating other organisms.

• All of the above are things all organisms need in order to carry out their basic activities.

When an organism is made up of only one cell, it is called a(n) ______ organism.

• unicellular

• multicellular

• prokaryotic

Which of the following statements is NOT part of the cell theory?

• Every living thing is made of one or more cells.

• Cells come only from other living cells.

• All cells contain a cell membrane, cytoplasm, and a nucleus.

A disadvantage to using electron microscopes over compound light microscopes is that they can harm live specimens when they are used to examine them.

• TRUE

• FALSE

Using a microscope, Van Leeuwenhoek was one of the first people to see ______.

• spontaneous generation

• living cells

• molecules

Which scientist observed a sample of cork under a microscope and first used the word “cell” to describe what he observed?

• Robert Hooke

• Anton Van Leeuwenhoek

• Louis Pasteur

Which scientist discovered that bacteria was causing disease in humans and proved that cells come from other cells, not from spontaneous generation?

• Robert Hooke

• Anton Van Leeuwenhoek

• Louis Pasteur