The branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
An antigen causes the body to make antibodies.
Answer:
At the time of inspiration, contraction of diaphragm takes place that enhances the chest cavity.
Explanation:
One of the prime muscle that takes part in the process of respiration is the diaphragm, which is situated below the lungs. It is a dome-shaped and large muscle, which spontaneously goes through a contraction, and largely the process takes place involuntarily.
The contraction of diaphragm takes place at the time of inhalation, which flattens and increases the chest cavity. Due to the contraction, a vacuum is generated that makes the air to get in within the lungs. In contrast, the diaphragm relaxes at the time of exhalation and moves back to its original shape, thus, making the air move out of the lungs.
Enzymes are protein in nature, (Mostly some RNA and DNA also can act as enzymes) but for generic purposes Enzymes are proteins.
Answer:
A. A cell wall
Explanation:
The organism found in this domain is bacteria. Bacteria do not have cell walls. This is why we take anti-biotics, they attack the cell membrane of the bad bacteria since they have no wall to protect themselves
