1. Two similarities between the skulls that might lead to the conclusion that these are all related species are:
- The presence of a similar overall skull shape, including the placement of the eyes and the general outline of the skull.
- The presence of similar dental structures, such as the arrangement and type of teeth (e.g., incisors, premolars, molars).
2. The biggest change in skull anatomy that occurred from the dawn horse to the modern horse is the elongation of the skull and the reduction in the size of the side teeth, with a significant increase in the size and complexity of the cheek teeth (molars) to adapt to a diet of grass.
3. The biggest change in leg anatomy that occurred from the dawn horse to the modern horse is the reduction in the number of toes from four on the front legs and three on the hind legs to a single hoof on each leg, which allows for faster running and better support on hard ground.
Parent Tip: Review the logic above to help your child master the concept of evolution worksheets.
