What is the smallest unit of a living thing?

• cell
• virus
• tissue
• organ

How are plant and animal cells similar?

• Both have a cell wall.
• Both form blood vessels.
• Both contain chloroplasts.
• Both have a cell membrane.

What is the job of the nucleus?

• controls the cell's activities
• traps the Sun's energy for the cell
• separates the cell from its environment
• controls what goes in and out of the cell

Which statement is true of cells?

• Another name for cells is organ system.
• Each cell in a plant or animal works by itself.
• Cells that look similar can have different jobs.
• Plant and animal cells have all the same parts.

Why would you use a microscope?

• to treat an illness
• to study the small details of a cell
• to count the bones in an animal's body
• to understand how an organ system works

Which kingdom lives on land and absorbs its food from other living or nonliving things?

• fungi
• plants
• protists
• animals

Which word best describes liverworts?

• conifer
• vascular
• vertebrate
• nonvascular

Which is true about how pine trees produce?

• They make spores inside of pine cones.
• They make seeds but do not have flowers.
• They make spores like ferns and mosses.
• They make flowers with seeds like fruit trees.

Why would a scientist classify an animal as vertebrate?

• It has a mouth.
• It can breathe air.
• It has a backbone.
• It can live on the land.

Which is an example of an arthropod?

• clam
• squid
• spider
• octopus