Which can you conclude about viruses?
They cannot make people sick.
They cannot reproduce.
They are not made of living cells.
They are easier to see than bacteria.
Which is an example of an organism getting energy from fuel?
A human eating an apple.
A puppy growing into an adult dog.
A duck laying eggs.
A tree losing its leaves in winter.
How is a hand lens similar to a microscope?
Both are living things.
Both make small things look bigger.
Neither is used by scientists.
Neither is used in the study of cells.
How are red blood cells and nerve cells similar?
Both carry things throughout the body.
Neither are shaped like soccer balls without any air inside.
Neither help to move muscles in the body.
Both are found in plants.
Which is true of root cells?
They have chloroplasts.
They are not found in plants.
They make food for the organism.
They take in water and nutrients.