Answer:
Mast Cells
Explanation:
Mast cells release histamine in the blood stream, when they detect a substance that triggers an allergic reaction, also called an allergen.
Answer:
Disaccharides are carbohydrate molecules formed when two monosaccharides join together.
Explanation:
All cells are surrounded by a Cell Membrane
By helping the ones who are already endangered and minimize habitat loss, global warming, etc.
Once a hypothesis is tested and confirmed, and then tested again and confirmed again by many others, it may provide the basis for, or become a part of, a scientific theory.