BIOLOGY:LIFE ON EARTH-W/ACCESS
11th Edition
ISBN: 9780134669076
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 2MC
Extinction
a. generally does not occur except during unpredictable mass extinctions.
b. ordinarily occurs at a relatively slow but steady rate.
c. has eliminated species at a faster rate than they have been formed.
d. has not played a major role in the history of life.
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Students have asked these similar questions
Ninety-nine percent of all the species that ever existed have gone extinct,
a. serving as evidence that current extinction rates are not higher than normal.
b. but most of these losses have occurred in the last 400 years.
c. which argues that the world just had too many species.
d. None of the choices is correct.
The 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.
If extinction is a natural part of life on Earth, why should we care about protectingendangered species
Explain
Chapter 18 Solutions
BIOLOGY:LIFE ON EARTH-W/ACCESS
Ch. 18 - 1. Almost all of the oxygen gas in today’s...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - 3. In the endosymbiotic origin of the...Ch. 18 - 4. Which of the following does not list...Ch. 18 - Prob. 5MCCh. 18 - 1. Because there was no oxygen in the earliest...Ch. 18 - 2. The molecule ________ became a candidate for...Ch. 18 - 3. Complex cells that contain a nucleus and other...Ch. 18 - 4. The sperm of early land plants had to reach the...Ch. 18 - 5. Early plants that protected their seeds within...
Ch. 18 - Prob. 6FTBCh. 18 - Amphibians gave rise to ____________, which had...Ch. 18 - 1. What is the evidence that life might have...Ch. 18 - Prob. 2RQCh. 18 - 3. Explain the endosymbiont hypothesis for the...Ch. 18 - 4. Name two advantages of multicellularity for...Ch. 18 - What advantages and disadvantages would...Ch. 18 - 6. Outline the major adaptations that emerged...Ch. 18 - Outline the evolution of humans from early...Ch. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- a. are we amidst an extinction right now ? why b. is it a mass or background extinction,arrow_forwardIf a sixth extinction event is occurring, how is it similar or different from the previous five mass extinctions? What sort of evidence do you think scientists look for to determine whether we are living through a mass extinction?arrow_forwardIf in the near future the scientific community decides with absolute certainty that there is only a 50% chance that climate change will occur. Why might we want to still move forward with reducing emissions to prevent climate change without higher certainty? a. because it is the right thing to do b. because the potential impacts of climate change pose a serious threat to mankind c. because protecting nature is more important than money d. because it is politically advantageous, although not fully necessary at that level of certaintyarrow_forward
- The term “Cambrian explosion” refers to (a) an increase in biodiversity. (b) a mass extinction. (c) an atmospheric detonation due to increasing gas concentrations. (d) an oceanic eruption caused by underwater volcanic activity.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_forwardThe graph below shows the population of three different families of marine organisms along five different mass extinction events. Each colour on the graph represents a family of organisms, and the Y axis shows how many species belong to that family. a. What stage of population growth is displayed at point ‘0’ on the graph above? b. The Extinction Event that occurred at point 3 was particularly significant. Using the graph, explain how this event impacted each marine family. c. The extinction events mapped above had significant impact on marine life. What type of event could have a similar impact on the human population?arrow_forward
- There have been five main mass extinctions. Match each mass extinction event to its description. 1. Permian extinction 2. Cretaceous-Tertiary extinction 3. Triassic extinction 4. Devonian extinction 5. Ordovician extinction a. This extinction was most likely due to a change in sea level. During this event, about 60% of all marine species were eliminated. b. This is the best-known mass extinction. It eliminated most large animals, including the dinosaurs. c. This was the most severe extinction event. About 96% of life on Earth died during this event. d. This extinction was most likely caused by climate change. About 80% of land animals died during this event. e. This extinction was most likely due to a change in sea level. It especially affected coral reefs.arrow_forwardWhich of the following terms most specifically describes what occurs when a group of organisms expands to take on new ecological roles, forming new species and higher taxonomic groups in the process? (a) speciation (b) mass extinction (c) evolution (d) adaptive radiationarrow_forwardA. How do you compare the diversity of population between the main landand an island?B. How do the mechanisms of evolution contribute to the extinction ofother organisms?arrow_forward
- explain why biologists fear that a mass extinction is occurring as a result of human activities?arrow_forwardDistinguish between biological extinction and mass extinction. Does every species have the right to survive without human interference, regardless of whether they serve a useful purpose to humans? Explain?arrow_forwardThe main arguments against the overkill hypothesis of megafauna extinction are a. Lots of species other than megafauna went extinct b. Rapid climate change destroyed the habitat that the megafauna depended on c. Many megafauna in North America went extinct before humans arrived d. All of the abovearrow_forward
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