makes a ribonucleotide molecule slightly heavier than a deoxyribonucleotide molecule, while the volumes occupied are

The oxygen atom at the 2′ position makes a ribonucleotide molecule slightly heavier than a deoxyribonucleotide molecule, while the volumes occupied are essentially equal.

Explanation:

Ribonucleotides, also known as RNA nucleotides, are the building block of ribonucleic acid (RNA), which contain ribose sugar as a sugar component, a phosphate and one base that can be adenine (A), uracil (U), guanine (G) or cytosine (C). Ribonucleotides are considered molecular precursors of nucleic acids. RNA nucleotides contain oxygen in the second carbon of the pentose ring. Deoxyribonucleotides are the building block of deoxyribonucleic acid (DNA), which contains deoxyribose sugar without oxygen in the second carbon of the pentose ring, a phosphate and one base that can be A, G, C or thymine (T), this last instead of U.

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2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

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