Which of the following best describes carcinogens?
a. carcinogens are completely safe.
b. carcinogens stimulate the brain's reward system.
c. carcinogens are chemicals known to cause cancer.
d. carcinogens block oxygen from getting into the bloodstream.

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

What is a group of organisms that are closely related and share similar characteristics

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.