Evolutionary Relationships

Question 1

Consider the phylogenetic tree of Old World primates.According to the tree, which primates share the most recent common ancestor with humans?

Revolt · Accepted Answer

bonobos and chimpanzees

Question 2

Which best describes traditional classification?

Revolt · Accepted Answer

It is based on shared characteristics.

Question 3

Which best describes derived characteristics?

Revolt · Accepted Answer

They are newly evolved traits.

Question 4

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

Revolt · Accepted Answer

crocodiles

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

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

Revolt · Accepted Answer

mollusks, echinoderms, chordates, and annelids

Question 7

Why was modern classification invented?

Revolt · Accepted Answer

Scientists understood that species share a common ancestor.

Question 8

Consider the cladogram.Which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?

Revolt · Accepted Answer

roundworms

Question 9

Which describes the modern classification system?

Revolt · Accepted Answer

based on evolutionary relationships

Question 10

In a cladogram, what occurs at a node?

Revolt · Accepted Answer

A derived trait appears.

Evolutionary Relationships Answers

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