Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Chapter 43, Problem 9TYU
FOCUS ON EVOLUTION
The fossil record indicates that there have been five mass extinction events in the past 500 million years (see Concept 23.2). Many ecologists think we are currently entering a human-caused sixth mass extinction event. Briefly discuss the history of mass extinctions and the length of time it typically takes for species diversity to recover through the process of evolution. Explain why this should motivate us to slow the loss of biodiversity today.
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LAB: THE LESSON OF THE KAIBAB
INTRODUCTION:
The environment may be changed by the things within the biotic community, as well as relationship between organisms and the nonliving environment. The carrying capacity of an ecosystem is the maximum number of organisms that an area can support over time. The density of a population may cause huge changes in the environment so that the environment becomes unstable for the survival of that species. Humans can mess up natural selection and have either a positive or negative effect.
OBJECTIVES
Graph data on the Kaibab deer population of Arizona from 1905-1939.
Analyze the factors that caused the changes in the deer population.
PROCEDURE:
Before 1905, there was an estimated 4000 deer on almost 30,000 hectacres of land on the Kaibab Plateau in Arizona. The average carrying capacity of the land at that time was estimated to be about 30,000 deer. Being concerned about the low number of deer, President Theodore Roosevelt created the Grand Canyon…
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Extinction is the complete disappearance of a species from Earth. A mass extinction is when more than half of all extant species disappear from the fossil record and there have been at least five of them.
In order to prevent the extinction current species, some areas of earth are preserved while others are conserved. Conservation seeks to prohibit human activity in an area. Preservation seeks the sustainable use and management of natural resources.
An endemic species is only found in one location. A biodiversity hotspot has over 1500 species of endemic insects and 70% of the area has been disturbed. There are 34 biodiversity hotspots on Earth.
Many sustainable practices are used in agriculture. Crop rotation is the practice of growing different kinds of crops in the same area in sequenced seasons. Conservation tillage is any method of soil cultivation that completely tills under the soil to prepare for the next crop. Genetically modified crops are…
After completing the Gvloer module- Biodiversity: Fragile Ecosystems, why is Evolution controversial anyway? discuss your opinion on the arguments presented. Include relevant information from the chapter, other sources or life experience that have helped shaped your view of how evolution fits with your faith world view.
Chapter 43 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 43.1 - Prob. 1CCCh. 43.1 - Prob. 2CCCh. 43.1 - WHAT IF? Imagine two populations of a fish...Ch. 43.2 - How does the reduced genetic diversity of small...Ch. 43.2 - Prob. 2CCCh. 43.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 43.3 - Prob. 1CCCh. 43.3 - Prob. 2CCCh. 43.3 - Prob. 3CCCh. 43.4 - How can the addition of excess mineral nutrients...
Ch. 43.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 43.5 - Prob. 1CCCh. 43.5 - Prob. 2CCCh. 43.6 - Prob. 1CCCh. 43.6 - Prob. 2CCCh. 43.6 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 43 - One characteristic that distinguishes a population...Ch. 43 - Prob. 2TYUCh. 43 - Prob. 3TYUCh. 43 - Prob. 4TYUCh. 43 - Prob. 5TYUCh. 43 - Prob. 6TYUCh. 43 - DRAW IT (a) Estimate the average CO2 concentration...Ch. 43 - Prob. 8TYUCh. 43 - FOCUS ON EVOLUTION The fossil record indicates...Ch. 43 - Prob. 10TYUCh. 43 - SYNTHESIZE YOUR KNOWLEDGE Big cats, such as the...
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- Species richness of many taxa (birds, trees, etc.) increases from the poles to the equator. Ecologists do not know exactly why, but the following idea(s) is/are well supported by evidence: Question 11 options: - The warmer climates of the tropics have longer growing seasons, more primary productivity and more benign climates which produce a larger resource base for more species and may increase specialization. - Polar and temperate regions have had to “start over” many times after successive glaciations, so species have had to re-colonize those areas. - Extinction rates are lower in tropical areas than temperate areas. --- First and Second Answers are BOTH true. --- Second and Third Answers are BOTH truearrow_forwardThe most severe mass extinction event, linked to the formation of Pangaea and massive volcanic eruptions, occurred at the end of the _______ period. Group of answer choices a Devonian b Triassic c Cretaceous d Ordovician e Permian People value biodiversity for all of the following reasons except a food, fiber, and medicine. b the acceptance that extinctions are part of a natural process. c opportunities to study and understand the world they live in. d aesthetic pleasure from interacting with other organisms. e functioning of ecosystems and the benefits they provide.arrow_forwardThe fossil record shows that in just the last 600 million years, there have been five instances of sharp decreases in the diversity and abundance of living organisms. what are these events? a. droughts b. mass extinctions c. reversals of the earth's magnetic field d. great migrationarrow_forward
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