Answered: Question 8. Suppose species in old…

Question 8. Suppose species in old clades were more likely to go extinct. How would this change the relationship between clade age and species richness?

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter18: Organizing Information About Species

Section: Chapter Questions

Problem 16SQ: Match the terms with the most suitable description. ______ phylogeny a. similar across many taxa...

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Concept explainers

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.

Question

L
Gymnospermae
100
200
100 200 300
Amphibia
0 50 100 150 200
0 25 50 75 100
Aranea
Diptera
50
100
150
50 100 150 200 250
50 100 150 200 250
050 100 150 200
Clade age (my)
Clade age (my)
Clade age (my)
Clade age (my)
Figure 3. The relationship between species richness and clade age in twelve groups.
Question 8. Suppose species in old clades were more likely to go extinct. How would
this change the relationship between clade age and species richness?
Log (richness)
Log (richness)
Log (richness)
Angiospermae
0
100
Actinopterygii
●
•
0100 200
0
200
●
●
T
300
400
Squamata
0
2.
0
6
0
0
0
300
4
2
0
2
0
4
2-
0
Pteridophyta
200
0
100
Mammalia
● 000 00
0
25
Coleoptera
0
300
50 75
2
2
0
Aves
Chondricthyes

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