Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 5MC
Summary Introduction
Introduction:
Extinction has many natural causes, but expansion of human population is currently the most significant cause.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Which of the following best describes a keystone species?
a. An organism, whose introduction causes or is likely to cause environmental harm
b. An organism, who if removed, the entire ecosystem changes.
c. Can signal a change in the biological condition of a particular ecosystem and diagnose the health of that ecosystem
d. Can indirectly protect several other species in the same habitat
16. Which is not a cause of extinction?.
A. Animals eat too much
B. Habitat loss C. Natural disasters
D. over-hunting
17. How can you help prevent extinctions?
A. By not polluting our environment.
B. By protecting sensitive habitats and species.
C. By not eating or buying products from endangered animals.
D. By allowing other people to hunt for their food.
18. Which of the following was a natural factor that caused extinctions?
A. Changes in the oxygen levels
C. Over harvesting
B. Habitat destruction
D. Pollution
19. What do most scientists think caused the mass extinction of dinosaurs and other organisms
at the end of the Cretaceous period?
A. An object from space struck Earth.
B. An ice age covered most of Earth with ice.
C. The dinosaurs ate too many other organisms and then starved.
D. Volcanic eruptions covered large areas with lava.
20. This.is the extinction of a species one by one, not a sudden loss of many species
A. Background extinction
B. Biotic potentíal
C. Fragmentation…
Why does the aquarium trade contribute to the introduction of nonnative species?
a.
Exotic species can escape or be released into local ecosystems.
b.
Aquarium owners do not always understand how ecosystems interact.
c.
Nonnative fish are shipped worldwide for aquariums.
d.
All of the above
Please select the best answer from the choices provided
A
B
C
D
Chapter 18 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
Knowledge Booster
Learn more about
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 species that has an immediate threat to extinction is said to be:a. threatened. c. alien.b. endangered. d. extinct.arrow_forwardHabitat fragmentation can reduce biodiversity by a. introducing more native species into a habitat b. sterilizing for pollution control C. decreasing human use of natural resources d. eliminating vast tracts of forests e. withdrawing an essential resource from native speciesarrow_forwardEcological dominants are a. the most numerous or make up the most biomass within a community. b. are species that may not be the most numerous within a community, but whose role is so significant that its absence would bring about considerable change. c. species that are introduced into an area where they do not naturally occur. d. the most important species on the planet.arrow_forward
- Rabbits are important grazers, maintaining some important grassland habitats. If a catastrophe were to reduce rabbit populations what would happen? * a. There would be more grass for the surviving rabbits b. The grassland would be invaded by trees and shrubs c. All of the abovearrow_forwardWhich of the following is one of the biggest threats to biodiversity? A. Invasive species B. Land protection C. Ecological conservation D. Habitat restorationarrow_forwardWhich of these is a true statement?a. Habitat loss is the most frequent cause of extinctions today.b. Exotic species are often introduced into ecosystems by accidental transport.c. Climate change may cause many extinctions but also expands the ranges of other species.d. Overexploitation of fisheries could lead to a complete collapse of the fishing industry.e. All of these statements are true.arrow_forward
- What is CITES? Group of answer choices A. Its aim is to ensure that international trade in specimens of wild animals and plants does not threaten their survival. B. an international agreement between governments C. All of the answers are correct D. the Convention on International Trade in Endangered Species of Wild Fauna and Floraarrow_forwardIf you are studying the changes in the panda population in Asia you are most likely considered a…. a. Population ecologist b. Ecosystem ecologist c. Global Ecologist d. Community ecologistarrow_forwardThe biggest impacts are made on the environment by: * A. The migration of organisms B. Predation C. Human interference D. Competitionarrow_forward
- Competitive exclusion is the result of a. mutualism by two species for the same limiting resource. b.competition c. parasitism d. symbiosis e.commensalismarrow_forwardAn _______species has population levels so low it is at great risk of extinction in the near future. a. endemic c. indicator b. endangered d. exoticarrow_forwardA conservation biologist has been asked to explain why it is important to protect biodiversity. She would list all of the following reasons except for which one? A. Humans are dependent on many species for food, medicines, fiber, and other necessities. B. Biodiversity can be exploited indefinitely for the profit of humans. C. Other species have inherent value and humans have a moral obligation to protect them. D. Biodiverse ecosystems provide ecosystem services that sustain all life on Earth. E. Biodiversity provides emotional and physical health benefits by providing places for humans to visit for wonder, insight, and exercise.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning