Exam 4: Macroevolution: First Life to Mammals

A tetrapod is defined as an animal with

Derived traits are defined as being inherited from an earlier species.

As of now, paleontologists put the origin of Earth at 4.6 BYR ago.

The principle of contingency claims what life is like at any given time depends on what happened previously.

The earliest evidence of what has come to be known as the Cambrian Explosions occurred in Alberta Canada.

The major difference in the anatomy of ray- and lobe-finned fish is that in the former, limb bones were articulated to the backbone and used in locomotion.

Plants and animals apparently evolved at about the same time, suggesting one did not evolve from the other.

What is a tetrapod and what is its importance to evolution?

Prokaroytes can be said to have all of the following traits EXCEPT

The principle that claims scientists believe populations changed in the past for the same reasons they change today is called

An example of the principle of homology is

What macroevolutionary lessons can be learned by looking at the first 3 byr of life?

Angiosperms differ from earlier plants because they have

Discuss the importance of the Chengjiang Formation and the Burgess Shale.

The authors of this text prefer the words "derived" and "ancestral" to "primitive" and "advanced" because the latter words are subjective and connote inferiority and superiority.

Which of these was the first amniote?

Fossil evidence of first mammals is heterodont teeth.

If you had fossils from two sibling species, how would you reconstruct their common ancestral group and with what would you to do it?

In what ways are mammals generalized animals? Essay Questions

A description of early amphibians in the evolutionary record would show they were the first animals of any size on land.