Periodic Test

Cancer starts from cells that start to grow uncontrollably fast. They destroy tissues and organs. What does this say about the effects of diseased cells on the higher levels of organization in an organism?

• A. Diseased cells do not affect the other parts of an organism.

• B. Cancer involves only certain kinds of cells and does not affect any other kind of cell.

• C. Diseased cells affect only the next higher levels of organization that they make up – the tissues.

• D. Diseased cells damage the higher levels of organization they make up: tissues, organs, organ systems, and eventually, the whole organism.

The heart pumps blood that carries oxygen and nutrients to the different parts of the body. To which organ system does the heart belong?

• A. Circulatory

• B. Digestive

• C. Excretory

• D. Reproductive

What two parts of the light microscope magnify the image of an object?

• A. eyepiece and mirror

• B. eyepiece and objectives

• C. objectives and mirror

• D. objectives and diaphragm