Parent material, organic matter, sand, silt, clay, water
In order to produce an effective immune response within the body, the person must be injected with a dosage of a virus or bacteria, and for it to be allowed to grow in the person, which replicates just enough to stimulate a response from the immune system.
Answer:
Cellulose and chitin
Explanation:
i think is the answer, not really sure
Nutrition is the process by which the body breaks down substances and gets energy from food.
Atmospheric pressure is sometimes known as barometric pressure. Air pressure is <span>exerted by the weight of </span>air<span> in the atmosphere of our planet Earth.
Air pressure is measured in an instrument called</span><span> barometer.</span>
