Evolutionary Relationships — Unit test

Question 1

In a cladogram, what occurs at a node?

Revolt · Accepted Answer

A derived trait appears.

Question 2

Consider the diagram.Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct?

Revolt · Accepted Answer

Both are correct.

Question 3

Which best describes derived characteristics?

Revolt · Accepted Answer

They are newly evolved traits.

Question 4

A scientist discovers a new organism that is related to clownfish. What can the scientist discover by using molecular clocks?

Revolt · Accepted Answer

the amount of time that the two species have been evolving apart

Question 5

Protists are a group of organisms that are characterized as eukaryotes (they have cells with nuclei) that are neither plants nor animals nor fungi. They are very diverse, and there are many hypotheses about their classification. The cladogram for protists is constantly changing and, sometimes, there are opposite hypotheses that both have data to support them. What is the implication of a changing hypothesis?

Revolt · Accepted Answer

It is acceptable because data are still being collected.

Question 6

Why was modern classification invented?

Revolt · Accepted Answer

Scientists understood that species share a common ancestor.

Question 7

Consider the cladogram.According to the cladogram, which organisms have roundworms as a common ancestor?

Revolt · Accepted Answer

mollusks, echinoderms, chordates, and annelids

Question 8

Which of the following are Phylogenetic trees also know as ?

Revolt · Accepted Answer

Cladogram

Question 9

According to the cladogram, which organisms are in the smallest clade with birds?

Revolt · Accepted Answer

crocodiles

Question 10

If two organisms are in the same clade, what can you predict about their relationship?

Revolt · Accepted Answer

They share a common ancestor.

Evolutionary Relationships — Unit test Answers

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