Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 32, Problem 9TYK
Summary Introduction
Introduction: Cambrian explosion refers to the rapid diversification of animals and it consists of three explosions in which several morphological (novel adaptations in prey predator), geological (increase in oxygen level) and genetic mutations and duplications occurred.
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Which of the following is not a hypothesis
used to describe the sudden change in the
diversity of lifeforms observed in the
Cambrian Period?
a. Increased continental drift creating
greater terrestrial landmasses
O b. Predator-prey arms race due to
evolution of locomotion and
development of exoskeletons
O c. Evolution of the Hox genes which
regulate complex body plans
O d. Rising sea levels, increasing the
volume of area species could
occupy
e. Continental flooding driving
increased nutrient and mineral flux
in the oceans
Which of the following periods is the earliest during which animals may have appeared? a. Ordovician period b. Cambrian period c. Ediacaran period d. Cryogenian period
The Cambrian Explosion occurred approximately 542 million years ago. During the Cambrian, what ‘exploded’?
a. The diversity of species on Earth, including many major animal phyla that exist today
b. The Yucatan Peninsula, which was hit by an asteroid
c. The quantity of oxygen in the atmosphere due to the expansion of coniferous forests
d. Numerous volcanoes worldwide, leading to the fourth mass extinction
Chapter 32 Solutions
Study Guide for Campbell Biology
Ch. 32 - a. What is a larva? b. How does a larva differ...Ch. 32 - Describe the three hypotheses for the rapid...Ch. 32 - Prob. 3IQCh. 32 - Prob. 4IQCh. 32 - Fill in the blanks in the following simplified...Ch. 32 - Prob. 1TYKCh. 32 - The process during which the germ layers are...Ch. 32 - Prob. 3TYKCh. 32 - Prob. 4TYKCh. 32 - Prob. 5TYK
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