WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 18, Problem 5MC
Summary Introduction
Introduction:
Extinction has many natural causes, but expansion of human population is currently the most significant cause.
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Students have asked these similar questions
When an invasive species alters the community structure it is introduced to, what can the consequence be? a. extinction of economically important species b. reduced predation on some native species c. increased predation on some native species d. all of the above
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…
Chapter 18 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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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 species that has an immediate threat to extinction is said to be:a. threatened. c. alien.b. endangered. d. extinct.arrow_forwardWhy 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 Darrow_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
- Habitat 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_forwardRabbits 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 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
- Which of the following is one of the biggest threats to biodiversity? A. Invasive species B. Land protection C. Ecological conservation D. Habitat restorationarrow_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
- 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_forwardCompetitive 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_forward
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