In humans, the pelvis and femur bone, are involved in walking. in whales, the pelvis and femur bones would be an example of? a. fossils. b. acquired traits. c. vestigial structures. d. natural variation.

C. Vestigial structures

The Middle Ages, or medieval time, is generally believed to have started with the fall of the Roman Empire in 476 and to have lasted about 1,000 years until about 1450. The beginning of the Middle Ages is called the Dark Ages because the great civilizations of Rome and Greece had been conquered.

Explanation: