Question

1.Plesiadapiforms had several primitive features, including

habitual terrestrial behavior.

the presence of a postorbital bar.

eyes that were placed on the sides of their heads.

nails instead of claws.

2.

Fossils are formed when

animals die slowly through starvation.

rocks are heated by volcanic activity and then cooled rapidly.

bone is mineralized by interaction with surrounding rock.

rocks are heated by volcanic activity and then cooled slowly.

3.

During the last 65 million years, which of the following occurred?

The average climate did not change but the variability went down.

The climate first warmed, then cooled, and most recently became variable.

The climate underwent a constant cooling trend, with decreasing variability.

The climate underwent a constant warming trend, with some recent variability.

4.

During which era did the first primates with modern features evolve?

Miocene

Paleocene

Oligocene

Eocene

Answer 1

1. Answer : eyes that were placed on the sides of their heads.

Plesiadapiforms are incredibly diverse group including more than 140 named species arranged into 11 different families. They had several primitive features, including eyes that were placed on the sides of their heads.

2. Answer: Bone is mineralized by interaction with surrounding rock.

Fossil is any kind of preserved remains, impression, or the trace of any once-lived thing from a past age or time. They are formed when bone is mineralized by interaction with surrounding rock.

3. Answer : The climate first warmed, then cooled, and most recently became variable.

During the last 65 million years, the climate first warmed, then cooled, and most recently it became variable.

4. Answer : Eocene

It was during geological period Eocene which lasted from about 56 to 33.9 million years ago at which the first primates with modern features evolved.