How Old Are the Oldest Fossils of More Advanced Organisms

question 4

Multiple Choice

How old are the oldest fossils of more advanced organisms, the eukaryotes?

• A)3.8 billion years
• B)3.5 billion years
• C)2.8 billion years
• D)2.1 billion years

---

Definitions:

Nucleotides

Organic molecules that serve as the building blocks of nucleic acids like DNA and RNA.

Introns

Non-coding sections of an RNA transcript, or the DNA encoding it, that are spliced out before the mRNA molecule is translated into protein.

Pre-mRNA

is the initial form of mRNA produced by transcription in eukaryotic cells before undergoing modification to become mature mRNA.

Protein

Protein is a macromolecule composed of amino acids, essential for the structure, function, and regulation of the body's cells, tissues, and organs.