Convection occurs when heat transfers through a. direct contact
b. electromagnetic waves
c. no particles of matter
d. fluid movement

Plants that have reproductive structures called cones are?

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

Name the glands associated with human digestive system