This is a series of skulls and front leg fossils of organisms believed to be ancestors of the modern-day horse. Equus (modern horse) Pilobirrus MArvebirRus Eohippus (Dawn Horse) Give two similarities between each of the skulls that might lead to the conclusion that these are all related species. 1. 2. What is the biggest change in skull anatomy that occurred from the dawn horse to the modern horse? 3. What is the biggest change in leg anatomy that occurred from the dawn horse to the modern horse?

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.