Identify the raw material of fermentation?

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

Idon’t understand and i need the answer! you

Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days. true or false