Question

lucy, a partial skeleton found in ethiopia, revealed a bipedal creature living approximately how many million years ago?
a. 4.6 million
b. 1.5 million
c. 2.7 million
d. 3.2 million

which factor is known to influence human adaptation and evolution?
a. stable climate conditions
b. consistent food sources
c. geographical isolation
d. uniform population genetics

comparative anatomy showcases similarities in:
a. circulatory systems of amphibians and birds
b. skeletal structures between humans and certain primates
c. cellular structures of plants and animals
d. brain sizes between mammals and reptiles

Explanation:

1. Lucy is an Australopithecus afarensis fossil. She lived approximately 3.2 million years ago.
2. Geographical isolation can lead to different selection pressures, influencing human adaptation and evolution. Stable climate, consistent food sources, and uniform population genetics do not have the same level of impact on evolution as isolation.
3. Comparative anatomy focuses on the similarities and differences in the anatomy of different species. The skeletal structures between humans and certain primates are compared in this field.

Answer:

1. d. 3.2 million
2. c. Geographical isolation
3. b. Skeletal structures between humans and certain primates