Which of the following is the best definition of an atom?
O
A. A positively charged particle
3. A negatively charged particle
C. The basic unit of all living things
O
D. The basic unit of matter

The basic unit of matter

Explanation:

An atom is the smallest unit of an element or any matter that can ever exist and still retain the properties of that matter. So, since matter could exist as gases, liquids or solids - atoms serves as the basic unit of matter.

Furthermore, an atom is neither a positively charged nor a negatively charged particle rather it is neutral (with no charge).

As well, it is a cell that is regarded as the basic unit of all living things, not an atom

Thus, an atom is best described as the basic unit of matter whether living or non-living.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.