CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 32, Problem 32.2CR
What caused ihe Cambrian exploston? Describe current hypotheses.
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Chapter 32 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 32.1 - Summarize the main stages of animal development....Ch. 32.1 - WHAT IF? What animal characteristics would be...Ch. 32.2 - Put the following milestones in animal evolution...Ch. 32.2 - VISUAL SKILLS Explain what is represented by the...Ch. 32.2 - MAKE CONNECTIONS Evaluate whether the origin of...Ch. 32.3 - Distinguish the terms grade and clade.Ch. 32.3 - Compare three aspects of the early development of...Ch. 32.3 - Prob. 3CCCh. 32.4 - Prob. 1CCCh. 32.4 - WHAT IF? Suppose ctenophores are basal metazoans...
Ch. 32.4 - Prob. 3CCCh. 32 - Prob. 32.1CRCh. 32 - What caused ihe Cambrian exploston? Describe...Ch. 32 - Describe how body plans provide useful Information...Ch. 32 - Prob. 32.4CRCh. 32 - Prob. 1TYUCh. 32 - The distinction between sponges and other animal...Ch. 32 - Prob. 3TYUCh. 32 - Prob. 4TYUCh. 32 - EVOLUTION CONNECTION A professor begins a lecture...Ch. 32 - SCIENTIFIC INQUIRY INTERPRET THE DATA Redraw the...Ch. 32 - WRITE ABOUT A THEME: INTERACTIONS Animal life...Ch. 32 - SYNTHESIZE YOUR KNOWLEDGE This organism is an...
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- Briefly describe at least two theories that attempt to explain the cause of the Cambrian explosion.arrow_forwardDo these phylogenies depict the same relationships among taxa? Explain yes/no and why. * А В C B A C B Aarrow_forwardWhat is the relationship among eons,epochs and periodsbof geologic time scale? Explainarrow_forward
- What types of organisms flourished in the Cambrian?arrow_forwardThe Cambrian explosion is a conundrum: how can the long prior history of the phyla, revealed by molecular divergence, be reconciled with their absence, and then sudden appearance, in the fossil record?arrow_forward-How long is the time span between the appearance of free atmospheric oxygen and evidence of complex (multicellular) forms? -How much time is there between complex forms and the Cambrian Explosion?arrow_forward
- What is the most accepted hypothesis on the origin of life on earth? How does it compare to the other main hypotheses?arrow_forwardRectangular Snip Which of the following is the common ancestor of organisms E, F, G, H? В E IV II H. LILarrow_forwardWhat is adaptive radiation? Explain with an example.arrow_forward
- Multiple Cholce Question The. approach creates phylogenies based on shared derived characters and ancestral characters. O taxonomic O genetic O paleontologic O cladisticarrow_forwarda. Phylogenetic relationships based on chloroplast genes Brown algae Diatoms Most photosynthetic dinoflagellates Cryptophyte algae Red algae Red algae Green algae Euglenids Green algae Chlorarachniophyte algae Green algae Green algae Green algae Green algae Land plants Glaucocystophytes Cyanobacteria b. Phylogenetic relationships based on nuclear genes Opisthokonts Amoebozoans Glaucocystophytes Red algae Green algae (including land plants) Cryptophyte algae 140000 Diatoms Brown algae Dinoflagellates Chlorarachniophyte algae Chloroplast genes relate brown algae, diatoms, most dinoflagellates, and cryptophyte algae to red algae, which is different from the relationships based on nuclear genes shown in part b. -Excavates Chloroplast genes relate euglenids and chlorarachniophyte algae to green algae, which is different from the relationships based on nuclear genes shown in part b. Chloroplasts form a monophyletic group nested within cyanobacteria, providing strong evidence for the…arrow_forwardWhat is adaptive radiation? Define and provide examples.arrow_forward
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