<span>Smaller groupings within a species are called varieties and breeds. The correct options among all the options that are given in the question are the first option and third option or option "A" and option "C". I hope that this is the answer that you were looking for and it has actually come to your help.</span>
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.
Answer:
Principal Cell
Explanation:
The main sodium ion absorption cells are the principal cell. These cells are also the site for the action of aldosterone.
