Passenger pigeons were driven to extinction________ . a. by introduced pathogens b. by overharvesting c. as a result of global warming d. by competition with introduced birds
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Passenger pigeons were driven to extinction________ .
a. by introduced pathogens
b. by overharvesting
c. as a result of global warming
d. by competition with introduced birds
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- If a species is no longer able to reproduce, it will a. adapt to its environment b. become extinct c. become immune to disease d. increase its population1.) Humans benefit from the presence of certain vitamin Kproducing bacteria that live in the large intestin The bacteria get food and shelter in return . This relationship is an example of A.)parasitism B.) predation C.) commensalism D.( mutualism 2.) A predator-prey relationship exists between the Canada lynx and the snowshoe hare. Lynx that are more successful hunters, are more likely to survive and reproduce, and thus pass on their traits to the next generation. Snowshoe hares that are faster or better at hiding are also more likely to pass on their successful traits From the above information , one can conclude that predator -prey interactions influence the process of A.) inbreeding B.) natural selection C.) artificial selection D.) parasitism 3.) Both intraspecific and interspecific competition affect population growth Which of the following statements about how population growth is affected by competition is correct? A.) Only intraspecific competition increases…Which statement about dispersal is false?(A) Dispersal is a common component of the life cycles ofplants and animals.(B) Colonization of devastated areas after floods or volcaniceruptions depends on dispersal.(C) Dispersal occurs only on an evolutionary time scale.(D) The ability to disperse can expand the geographic distribution of a species.
- FRONTLINE: Poisoned Waters (Puget Sound) The film portrays the resource value of orca whales as primarily one of existence value. That means orcas are valued mostly a) for their potential, undiscovered value. b) for keeping the ecosystem in balance by eating salmon. c) merely because people know they are there. d) as a tourism resource. e) for their oil and blubber.During the 1800’s in NC and the Us the what domestic animal species posed the most risk for transmission of rabies to humans?Which is not a factor that leads to the extinction of a species? A. disease b. individuals c. genetic mutations d. adapatation e. climate
- H5N1 and SARS are examples ofa. extinct species.b. forms of greenhouse gases.c. endangered habitats.d. emerging diseases.TejaTscharntke’s studies of the food web associated with Phragmites reeds revealedthat:a.only a single parasitoid species can persist exploiting a single speciesof herbivore.b.only a single herbivore species can persist attacking a single speciesof plant.c.predation by birds actually protects herbivores, because the birds feedon parasitoid-infested herbivore galls but not uninfested galls.d.within local food webs, all interactions tend to be of roughly the samestrength.e.recognizing variation in interaction strength can greatly simplify thedepiction of a food web.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 above
- 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.A pack of wolves is making its way to a place in which there are many zebras. What is the negative outcome of their encounter based on their symbiotic relationship? a. The zebras will not do anything b. The wolves will move out from the place. c. The zebras will feed the wolves with grass. d. Wolves will kill a zebra.How did the buffalo almost go extinct? A. A sudden interest in buffalo hides among settlers inspired profits and the mass slaughtering of the buffalo B. Since most Native Americans were pushed out of their native lands and into the Prairies, where the buffalo roamed, they had no choice but to survive by hunting the buffalo in enormous quantities C. Since Prairie land was extremely difficult to farm, settlers overreached their demand for buffalo meat D. The movement of settlers caused the environment to change, destroying the buffalo's natural habitat
