Answer:
e. equal numbers of protons and neutrons in the nucleus orbited by varying numbers of electrons
Explanation:
Answer:
The force of attraction btwn same substances
Explanation:
Answer:
Proteins
Explanation:
Proteins are made up of many repeating units (monomers) of amino acids that are joined by peptide bonds.
Hope this helps :)
The average adult needs 1,000 mg of calcium per day in the body.
<h3>What is Calcium?</h3>
This is a chemical element with the symbol Ca and atomic number 20. It is involved in the strengthening of bones and teeth in the body so as to reduce risk of fracture.
Average adults require 1,000 mg of calcium per day for optimal functioning of body cells.
Read more about Calcium here brainly.com/question/103896
The <em>correct</em> answer is <u>B</u>, <u>hydra</u>.