Two different species are discovered in the rainforest and their DNA sequences
are 94% the same. What does this similarity suggest ?

The similarity of 94% in their DNA sequence suggest that they have originated from a common ancestor and are closely related species.

Explanation:

The difference in DNA sequences in different species is due to the accumulation of genetic variation in the course of natural selection and evolution. Less is the difference in DNA sequences of two organisms the more related they are.

Genes determine the characteristics in an organism, and they are DNA sequences determining the protein to be formed. The similarity in DNA sequence of two species establish the evolutionary relationship among them.

Due to the genetic variation in species, the natural selection of the species had caused the evolution of the species adapted well to the environment.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.