The primary ossification center of a long bone is located:
A. at the midpoint of the diaphysis
B. in the epiphysis
C. in the medullary cavity
D. at the epiphyseal cartilage

Where is having brightly colored feathers that attract mates most clearly an adaptation for a bird? a. a forest with dense vegetation b. a sandy beach beside an ocean c. a snowy tundra with little vegetation d. a swamp with many hawks that eat birds