A basic event in reproduction is the creation of a DNA copy, where cells use chemical reactions to build copies of their DNA.

DNA in the cell nucleus serves as the information source for making proteins. Different proteins are produced based on the information encoded in the DNA.

The information source for the inheritance of features is the DNA (Deoxyribo Nucleic Acid) molecules located in the chromosomes of the cell nucleus.

Organisms look similar because their body designs are similar, and these designs are based on similar blueprints.

We usually determine that two different individual organisms belong to the same species based on their similarity in appearance. Reproducing organisms create new individuals that share similarities with themselves, aiding in the classification of organisms into the same species.