According to fossil records, the horses that lived 50 million years ago were much smaller, weaker and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses

The casefor proofs

It was said to have happened by earthquakes, the shifts in the tectonic plates moved everything 

Ibelieve the answer is that the sparrows have only one type of base in their cells; while robins have many types.  the five different types of bases found in living things are; uracil, thymine, guanine, adenine, and cytosine. thymine, guanine, adenine, cytosine are  normally found in the dna, while in the rna thymine is replaced by uracil. 

Answer//reptiles and dinosaurs both lay eggs,alligators and crocodiles are similar ,they have sharp teeth and there skin are also similar;