BIOLOGY CONNECT ACCESS CARD
12th Edition
ISBN: 9781264037452
Author: Raven
Publisher: MCG
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Chapter 58, Problem 5S
Summary Introduction
To discuss:
The small population size causes extinction or some other factors lead to the extinction of small population.
Introduction:
The term extinction in biology refers to the death of the last individual of the species. After extinction, the species gets terminated forever. The
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The Earth is currently experiencing the sixth mass extinction event. Conservation efforts attempt to identify and focus on the
species most at risk of going extinct.
Which characteristics make species more vulnerable to extinction?
species that have a generalized diet
species that have a small population size
species that are not negatively affected by introduced species
species that are used by humans for food and clothing
species that have a long life span
The number of extinctions of birds and mammals has gone up as human populations have increased.
True or False ?
You are watching a documentary on television about grizzly bears in North America. The narrator is speaking over a clip of two cubs and their mother walking along a riverbank in a heavily wooded forest. She says that grizzly bear populations are rising for the first time in several decades even though deforestation is still a growing problem in North America.
Which of the following could be a possible factor for the increase in the grizzly population?
Loss of habitat
Reduction of resources
Increased industrialization
Higher birth rate over death rate
Chapter 58 Solutions
BIOLOGY CONNECT ACCESS CARD
Ch. 58.1 - Describe the history of extinction through time.Ch. 58.1 - Prob. 2LOCh. 58.2 - Prob. 1LOCh. 58.2 - Prob. 2LOCh. 58.3 - Prob. 1LOCh. 58.3 - Explain how these causes can interact to bring...Ch. 58.4 - Prob. 1LOCh. 58.4 - Describe the potential roles of natural selection...Ch. 58.4 - Prob. 3LOCh. 58.5 - Prob. 1LO
Ch. 58.5 - Prob. 2LOCh. 58.5 - Prob. 3LOCh. 58 - If we assume that population density is a good...Ch. 58 - Prob. 2DACh. 58 - Would the extinction rate increase if an area were...Ch. 58 - Prob. 4DACh. 58 - Why do population density and growth rates differ...Ch. 58 - Why might whale populations fail to recover once...Ch. 58 - Why do small populations lose genetic variation?Ch. 58 - Prob. 1UCh. 58 - The economic value of indirect ecosystem services...Ch. 58 - The amphibian decline is best described as a....Ch. 58 - Prob. 4UCh. 58 - When populations are drastically reduced in size,...Ch. 58 - A captive-breeding program followed by release to...Ch. 58 - Historically, island species have tended to become...Ch. 58 - Ninety-nine percent of all the species that ever...Ch. 58 - To effectively address the biodiversity crisis,...Ch. 58 - The introduction of a nonnative predator to an...Ch. 58 - If 99% of the species that ever existed are now...Ch. 58 - Prob. 2SCh. 58 - Prob. 3SCh. 58 - Prob. 4SCh. 58 - Prob. 5S
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- Low population size is probably the single best predictor of extinction risk. Why are small populations generally at much greater risk of extinction than larger populations?arrow_forwardExtinction is the elimination of all the individuals of a particular kind. Select one: True Falsearrow_forwardHow does extirpation differ from extinction? Group of answer choices Extinction and extirpation are the same thing. Extirpation is the loss of a single population, while extinction is the loss of an entire species. Extinction only happens during a mass extinction. Extinction is the loss of a single population, while extirpation is the loss of an entire species.arrow_forward
- Eastern loggerhead shrike is a critically endangered species of bird in Canada. Its population has been declining since the 1960s, and it has been speculated that habitat loss, pesticide usage combined, and climate change have affected the shrike population size. In 2004, there were approximately 70 loggerhead shrikes breeding in Canada. Over the next five years, 111 new shrikes were born, 57 died, and 15 left the area. Calculate the change in the population of eastern loggerhead shrike between 2004 and 2009. Express your answer rounded to the nearest whole number. Answerarrow_forwardIf the human species were to suffer a population crash, list three species that might move in to occupy part of our ecological niche. List and explain three species that would likely decline as a result.arrow_forwardCan you please explain when the population size gets unaffected, smaller, and larger than expected?arrow_forward
- A population of 1,492 finches is introduced to a rainforest. Over the next year, the finches show a death rate of 0.395 while the population drops to 1,134. What's the birth rate for this population? Is this proving to be a suitable habitat? (Two answers) * O Yes, this is a suitable habitat. The birth rate is higher than the death rate. No, this is not a suitable habitat. The birth rate is much lower thn the death rate. 589 D 358 O 0.155 O 0.845 Which of the following is true of a population approaching its carrying capacity? O The population's rate of increase approaches zero, O O O O OCarrow_forwardIn your region, what species are threatened with extinction? Why are they vulnerable? Suggest steps that could be taken to increase their populations.arrow_forwardWhich of the following species is most likely to become extinct? Group of answer choices a species that is losing its habitat due to deforestation a species that has a great amount genetic variation a species that has a decreasing number of predators a species that is well adapted to its environmentarrow_forward
- A population of 1,492 finches is introduced to a rainforest. Over the next year, the finches show a death rate of 0.395 while the population drops to 1,134. What's the birth rate for this population? Is this proving to be a suitable habitat? (Two answers) * Yes, this is a suitable habitat. The birth rate is higher than the death rate. No, this is not a suitable habitat. The birth rate is much lower then the death rate. 589 -358 0.155 0.845 Which of the following is true of a population approaching its carrying capacity? The population's rate of increase approaches zero. ロロロ□arrow_forwardThe example of the Heath Hen provides which of the following important lesson for managing small populations - Genetic drift is more powerful in small populations and can lead a species to extinction - Understanding the factors that make a population small are more important than the factors that ultimately drive it to extinction - Intensive management is successful for bringing back species from the brink of extinction - Allee effects can make managing a small population very difficultarrow_forwardDescribe the mechanisms by which human population growth and resource use causes increased extinction rates.arrow_forward
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