The number of atoms changes during a chemical reaction. true false

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

What is an example of excretion in mammals?