Answer:
Explanation:
Acid. is a substance that increases the hydrogen ion concentration in a solution.(hight H+ concentrations) ~When hydrochloric acid is added to water, hydrogen ions dissociate from chloride ions: HCl -> H+ + Cl− ~Addition of an acid makes a solution more acidic.
Explanation:
Carrier proteins are proteins that carry substances from one side of a biological membrane to the other.
I would think of a unicellular organism or a plant, but I'm not too sure on this one, Just trying to help :)
Lignin
It is a complex organic polymer that form an important structural materials in the support system of vascular plants and can also be found in some algae. This is an important molecule in the structural composition of cell wall, such as in wood and bark. This also allow woods and barks to have strong, rigid which allows them to no break easily. Lignin can also be found inserted in the cell wall of this plants.
Parasitism; the tick benefits from the human, the host.
