D because this is the process of when the nitrogenous bases are going to match each other to form our DNA sequence
Answer:
Hydrogen and helium.
Explanation:
Extrasolar planets, also called exoplanets are the planets that are placed out of the solar system and it orbits around another star, not the Sun. The planets that are not orbiting around the Sun are made of two easiest elements, and those elements are hydrogen and helium. Extrasolar planets are very strange objects that are not even close to looking like Earth.
The main type of evidence the scientists used is fossils.
Palaeontologists study plants and animals that existed in the geologic past. To do so, they use fossils and try to determine an organism's evolution and relationship with the environment and other organisms. In this example, palaeontologists used fossils from ancient horses that have gone extinct and try to decipher their evolutionary path. Recognising the evolutionary steps of the ancient horses will make it possible to compare them to the modern horses.
