Question

In Mesohippus, which key trend regarding the digits is observed?

Options

• The side digits completely disappeared, leaving a single digit

• All digits became equal in size and function

• The middle digit became stronger

• The number of digits increased from three to four

Answer 1

Mesohippus, which appeared later than Eohippus, had a larger body and three digits. The key trend at this stage was that the middle digit became stronger, foreshadowing its eventual dominance in later horse ancestors.