Canon Paleo Curriculum Unit: 3 Evolution Lesson Plan 10 (Page 3 of 4) in pdf

Canon Paleo Curriculum Unit: 3 Evolution Lesson Plan 10 Page 3

2. Look for and color the following kinds of bones for each fossil horse.

a. Color the toe bones red, these are marked for you with an x.

b. Color the foot bones blue, these are marked with a y.

c. Color the ankle bones green, these are marked with a w.

d. Color the heel bones yellow, these are marked with a z.

3. Using the diagrams in Figure 2, make measurements to fill in Table 2.

Table 2. Evolution of the Horse

Kind of horse

Hyracotherium

Miohippus

Metychippus

Equus

Number of toes

Number of toe bones

Number of foot bones

Number of ankle bones

Number of heel bones

Total number of foot bones

Length of foot (measure inset diagrams) (mm)

Height of teeth (mm)

QUESTIONS

1. What changes occurred in the surroundings of horses from Hyracotherium to Equus?

2. What change occurred in the shape of the horse from Hyracotherium to Equus?

3. What changes occurred in the size of the horse from Hyracotherium to Equus?

4. As the surroundings changed, what happened to the teeth of the horse?

5. Describe the overall changes in foot length, number of toes, and size of toes in the horse

over time.

6. How would natural selection have caused changes in the size, feet, and teeth of the

horse?

Canon Paleo Curriculum Unit: 3 Evolution Lesson Plan 10 Page 3