Answer: They help reconstruct what happened the most precisely
Because evolution itself is a very slow process. Having said that, the chance of having a continuum of various animals would mean that evolution would have progressed very fast. Because evolution is slow, different species establish themselves for different ecological niches and environments, this enables them to become better through time at a certain environment which then leads to eventual diversification in the number of species.
B changed in the frequently of the certain alleles in a population
Deserts tend to form around 30 latitude because that region is the subtropics where they experience high air pressure so clouds won't form and there would be very little or no precipitation and because it is far inland so far away from bodies of water so to answer your question no probability not
Answer: For building amino acids, proteins and nucleic acids.
Explanation:
Living cells requires nitrogen because they are major part of amino acids. They form the building block of protein and nucleic acids such as DNA which carry the genetic information and is passed from generations to generations. Plants and animal need nitrogen for growth and survival. The protein is use for building and repairing muscles and it is a necessity for growth.