Answer: An antigen
Explanation:
A molecule that evokes immune response in the body of an organism is known as antigen. These substance can be protein, carbohydrates, lipids when asked for chemical nature.
Physically these substance can be dust particles, smoke, pollen grains, some food particles. Antigen can be defined as the substance that tends to produce immune response by the immune system of the body.
Hence, the correct answer is option D
It’s living vs non living
Answer:
C, carbon dioxide and water
I think the answer is D) Precipitation. Hope this helps!! Please mark me Brainiliest!!
B.
Key word: slide
Think of sliding down a WATER slide.
