Cells Review

What is the smallest unit that can be considered a living thing?

• An atom

• A tissue

• A cell

• A molecule

How many cells are approximately in a human body?

• 100 trillion

• 50 trillion

• 50 billion

• 1 million

Which of these is an example of a large cell visible to the human eye?

• A chicken egg yolk

• A skin cell

• A blood cell

• A nerve cell

What is a common job that all cells perform?

• Swimming

• Producing energy

• Creating colored pigments

• Photosynthesis

In a multicellular organism, how do cells work together?

• They work independently

• They collaborate to perform overall functions

• They compete with each other

• They all perform the same job