A simple columnar epithelium<span> is a </span>columnar epithelium<span> that is uni-layered. In humans, a simple </span>columnar epithelium<span> lines most </span>organs<span> of the digestive tract including the stomach, small intestine, and large intestine. Simple columnar epithelia line the </span>uterus<span>.</span>
I think that the answer is C.
Answer:
C.
Explanation:
All these carbon atoms are isotopes: they have the same amount of protons (in this case, 6 because carbon always has 6 protons) and the same amount of electrons (6 because the carbons given have a neutral charge).
Therefore, the only thing we are changing is the atomic mass and the amount of neutrons present in each isotope.
In Carbon-12, there are 6 protons, 6 neutrons, and 6 electrons.
In Carbon-13, there are 6 protons, 7 neutrons, and 6 electrons.
In Carbon-14, there are 6 protons, 8 neutrons, and 6 electrons.
Nucleic acid<span> typically contain phosphorous, and nitrogen plays an important structural role in nucleic acids and proteins. The proteins, being made up a diverse set of amino acids, have, in addition to carbon, hydrogen, oxygen, and nitrogen, the elements sulfur and selenium.</span>
Answer:
Transport proteins allows only enzymes to pass through the membrane
Explanation:
