How is the DNA code itself a homology?

Explanation:

These fundamental similarities are most easily explained by evolutionary theory: life shares a common ancestor. ... In fact, the DNA code itself is a homology that links all life on Earth to a common ancestor. DNA and RNA possess a simple four-base code that provides the recipe for all living things.

the DNA code itself is a homology that links all life on Earth to a common ancestor. DNA and RNA possess a simple four-base code that provides the recipe for all living things.

Option D. Automobiles, Aircrafts

Explanation:

Titanium is as strong as steel and very less dense. Because of low density and high melting point it is used in Aircrafts.

Titanium is used as an alloying agent with metals like aluminium and iron also.

Since these alloys are very strong in nature so used to manufacture the parts of automobiles.

Therefore, Option D. will be the answer.