What is the basic unit of life?

Which of these is a plant?

What do plants need to make their own food?

What part of the body pumps blood?

Which animal lays eggs?

What gas do humans breathe in?

What helps the body fight off germs?

What is the process by which plants make their own food called?

Which of these is a mammal?

What do we call the green pigment found in plant leaves?