Here's why:
* DNA carries genetic information: DNA acts like a blueprint, containing instructions for building and maintaining an organism. These instructions are encoded in the sequence of its four nucleotide bases (Adenine, Thymine, Guanine, Cytosine).
* Inheritance: DNA is passed down from parents to offspring, ensuring the transmission of traits.
* Variations: Differences in DNA sequences account for the variations we see among individuals within a species.
* Evolution: Over time, changes in DNA sequences through mutations and other mechanisms drive evolution.
While RNA (Ribonucleic Acid) also plays a crucial role in protein synthesis and other cellular processes, it's DNA that holds the primary genetic information and is responsible for inheriting traits.