Woese proposed a new classification system in 1990.What was different about his system?
A. It included the addition of a new level called “kingdom”
B. It included the addition of a new level called domain
C. It included the removal of the level called kingdom
D. It included the removal of the level called domain

Answer is B.) it includes the addition of the new level call "Domain".

Explanation:

i guessed and got it right

i think the answer is composed of atoms

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.