33. What role do antigens play in many autoimmune diseases?
A) They cause an immune response.
B) They are how some diseases are inherited.
C) They destroy the immune system.
D) They destroy all body cells.

Describe two recent or ongoing space missions.

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

The hardy-weinberg principle is that genetic frequencies in a population? will remain stable from generation to generation will always be changing will not be affected by environmental changes are always in a 3: 1 ratio