This blood component is involved in clotting of blood following a wound.

A) red blood cells
B) neutrophils
C) platelets
D) plasma proteins

Which of the following is NOT a function of simple epithelium?

A) diffusion
B) protection
C) secretion
D) absorption

When an enzyme catalyzes a chemical reaction, it is consumed in the process, so it cannot be used repeatedly.

Which group of organisms is mostly saprotrophic decomposers that assist in recycling of nutrients in ecosystems.

A) Algae
B) Viruses
C) Fungi
D) Protozoans
E) Ciliates