The role of antibodies in the human body is to A. stimulate pathogen reproduction to produce additional white blood cells
B. increase the production of guard cells to defend against pathogens
C. promote the production of antigens to stimulate an immune response
D. recognize foreign antigens and mark them for destruction

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

The distribution of related animals and plants across the world

Which enzymes break down carbohydrates?