When air is breathed in...

• ...oxygen is taken into the bloodstream and carbon dioxide is passed out.

• ...carbon dioxide is taken into the bloodstream and oxygen is passed out.

True or False? "In human body cells, chromosomes usually come in pairs."

• True

• False

Which process involves the movement of water only?

• Diffusion

• Osmosis

• Active Transport

When using a light microscope to view a slide, which lens should be selected to start with?

• Lowest-powered objective lens

• Highest-powered objective lens

Chloroplasts...

• ...strength a plant cell.

• ...store the genetic material of a cell.

• ...absorb light energy to make glucose.

Which of these characteristics makes the alveoli efficient at gas exchange?

• They have thick walls.

• They have a large surface area.

Which of these parts are not found in a bacterial cell?

• Nucleus

• Cell membrane

• Cell wall

True or False? "Mitosis results in two cells that are genetically different."

• True

• False

What is a tissue?

• A collection of different types of cell that work together.

• A collection of similar cells that work together.

What colour is iodine solution in the presence of starch?

• Blue-black

• Brown-orange