Biology Practice Test – The Transport Systems

The ventricles of the mammalian heart have thicker muscular walls than the auricles because the ______

A. ventricles are larger.
B. ventricles receive more blood.
C. ventricles pump blood to longer distances.
D. auricles have smaller capacity.

Carbon dioxide is carried in the plasma _______

A. in combination with haemoglobin
B. in combination with antibodies
C. by capillary action
D. as bicarbonate ion.

Which of the following heart structures is best adapted to cope with double circulation?

A. One auricle and one ventricle
B. Two auricles and one ventricle
C. Two auricles and partially divided ventricle
D. Two auricles and two ventricles

Red blood cells were found to have burst open after being placed in distilled water for an hour. This phenomenon is known as ______

A. plasmolysis.      B. diffusion      C. haemolysis.      D. wilting.

Which of these factors does not contribute towards the ascent of water in plants?

A. Root pressure      B. Capillarity      C. Transpiration pull      D. Turgor pressure