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Biology Now

Anne Houtman; Megan Scudellari; Cindy Malone

Chapter 11

Evidence for Evolution - all with Video Answers

Educators

Chapter Questions

03:41

Problem 1

Intermediate fossils
(a) share some similarities with their ancestral group.
(b) share some similarities with their descendant groups.
(c) both of the above
(d) none of the above

Sana Riaz
Sana Riaz
Numerade Educator
02:12

Problem 2

If two different organisms are closely related evolutionarily, then they will:
(a) be similar in size.
(b) share a recent common ancestor.
(c) have very different DNA sequences in their genes.
(d) be randomly located throughout the world.

Sana Riaz
Sana Riaz
Numerade Educator
02:48

Problem 3

When two organisms are very distantly related in an evolutionary sense,
(a) they should have extremely similar embryonic development.
(b) they must share a very recent common ancestor.
(c) the sequences of DNA in their genes should be less similar (more different) than those of two more closely related organisms.
(d) they should share more homologous traits than two more closely related organisms share.

Sana Riaz
Sana Riaz
Numerade Educator
03:17

Problem 4

Link each term with the correct definition.
BIOGEOGRAPHY
FOSSIL RECORD
DNA SEQUENCE SIMILARITY
EMBRYONIC SIMILARITY
HOMOLOGOUS TRAITS
1. A reconstruction of the history of life on Earth.
2. The similarities in the nucleotide sequences among related organisms.
3. The similarities among organisms that are due to the fact that the organisms evolved from a common ancestor.
4. The geographic locations where related organisms and fossils are found.
5. Specifically during development, complex structures in descendant species that are generally elaborations of structures that existed in the common ancestor.

Sana Riaz
Sana Riaz
Numerade Educator
04:40

Problem 5

All mammals have tailbones and muscles for moving a tail. Even humans have a reduced tailbone and remnant tail-twitching muscles, though these features have no apparent usefulness. These traits in humans would best be described as
(a) convergent structures.
(b) fossil evidence.
(c) evidence from biogeography.
(d) vestigial traits.

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Sana Riaz
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03:07

Problem 6

Reduced tailbones and the associated remnant muscles in humans are an example of what type of evidence for common descent?
(a) artificial selection
(b) homologous traits
(c) biogeography
(d) fossil evidence

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Sana Riaz
Numerade Educator
02:30

Problem 7

7) When a population evolves to be better fitted to its environment, this is an example of ____________,
about by the process of _______.

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Sana Riaz
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08:50

Problem 8

In one sentence each, identify the similarities and the differences between artificial selection and natural selection.

Sana Riaz
Sana Riaz
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