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
Fossils that serve as transitional links allow scientists toa. determine how prehistoric animals interacted with each other.b. deduce the order in which various groups of animals arose.c. relate climate change to evolutionary trends.d. determine why evolutionary changes occur.
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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- During the ____ epoch, there were fewer ____ and more ____, a reversal in the relative representation of these forms during modern times. a. Eocene; omomyids; eosimiids b. Miocene; Old World monkeys; apes C. Miocene; apes; Old World monkeys d. Oligocene; apes; Old World monkeys e. Paleocene; New World monkeys; Old World monkeysarrow_forwardMARSUPIALS EUTHERIANS (PLACENTAL MAMMALS) opossum thylacine Tarsipes kangaroo deer pig dog horse rabbit treeshrew lemur baboon human sloth echidna bird turtle хх = claws O = flattened nails x = hoovesarrow_forwardThis video refers to Denisovans as a “Ghost Lineage.” In fact, Denisovans don’t even have a formal scientific name. What is the physical evidence that anthropologists need to further define and understand the Denisovans? A. None of the above B. A Type Specimen (and more Denisovan fossils) C. Neanderthal DNA D. H. sapiens DNAarrow_forward
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- Several very distantly related species (e.g., bats, birds, insects) have evolved the capability of flight. The most recent common ancestor of insects and vertebrates likely lived over 500 million years ago and was flightless. This independent evolution of flight in multiple, distantly related taxa is an example of what evolutionary process/pattern? a. Evolutionary reversal b. Convergent evolution c. Speciation d. Synapomorphyarrow_forwardWhich of the following statements about the fossil record is true? a. The fossil record is a complete accounting of life on earth b. The fossil record is unbiased in the fossils that are found c. The fossil record is evenly sampled across all of life's history on earth d. There are certain biases in the fossil recordarrow_forwardFossil insects many times larger than any insects alive today have been dated to the Carboniferous and Permian periods. These fossils are evidence that during these periods a. the climate was much warmer than it is today. b. the oxygen concentration of the atmosphere was significantly higher than it is today. c. the carbon dioxide concentration of the atmosphere was lower than it is today. d. insects had fewer competitors for food than modern insects. e. there were fewer predators on insects than there are today.arrow_forward
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