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Species extinction is

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שאלה #133736

		Is a result of the increased human influence on earth
done		Is a natural part of the evolutionary process
		Does not have any effect on biodiversity loss
		Currently, in the 21st century, the rate of species evolution is much higher than the rate of species extinction

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The term 'Mass Extinction' means

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שאלה #133738

		Refers to a mass extinction event of large-bodied species, such as the dinosaurs
done		Refers to events associated with much higher “extinction rates” than the background extinction rate
		Refers to extinction events which are a direct result of human actions
		Refers to six geological eras in which new evolving species became extinct

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The current state of biodiversity is

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שאלה #133739

		The majority of all existing species have been listed in the IUCN Red List as threatened, which means that they face high risk of extinction in the wild
done		The IUCN red list is continuously updated according to changes in species status throughout time: for example, the percent of threatened mammal species has decreased considerably in the last decade
		A species is defined as extinct in the wild if no members of the species are found in the species’ breeding sites during the breeding season
		Only a minor portion of all existing species have been evaluated and categorized for their status by the IUCN

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Efficient conservation efforts should

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שאלה #133740

		Focus only on ecosystem restoration
done		Target a range of spatial scales and different conservation units
		Omit reintroduction projects as these are expensive and risky
		Direct all research efforts to species protection

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The main advantage of reintroduction is that it:

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שאלה #133743

done		Improves the conservation of species and its ecosystem
		Reestablishes the role of top predators in the ecosystem thus restoring the ecosystem functionality
		Attracts public awareness to the importance of returning species that occurred during the Pleistocene.
		All answers are correct

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Usually, small populations:

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שאלה #133745

		Attract public awareness because of their role in disease transmission to other species
		Have high genetic diversity which can lead to species extinction
done		Are prone to extinction because of the combined effect of different factors
		Are spatially connected to other populations

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Which case has the highest probability for a successful reintroduction project?

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שאלה #133746

		The release site is within the species’ historical range of distribution, where natural habitats are under development pressure
done		The released individuals are selected according to their sex and age from a permanent breeding core of the species correct
		Hunting is forbidden in the site of release but is enabled in its surroundings
		he population in captivity is large and individuals are released directly to the wild to acclimatize to the natural conditions without the need for habituation enclosure

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In which of the following cases should species reintroduction be avoided?

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שאלה #133747

		The species’ population in captivity is large
		The species is not considered a flagship species
done		The species’ natural habitat is patchy and disconnected/isolated
		unting is regulated in the species’ natural habitat

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When is a species considered critically endangered by the IUCN?

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שאלה #133749

		If no members of the species are found in the species’ range of distribution over a period of several years
done		If it is spread over a relatively small range (less than 100 square km)
		If it has low genetic diversity
		If its population suffers from a highly transmissible disease

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What is the major aim of Conservation Biology?

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שאלה #133751

		To bring back the extinct species
		To rewild ecosystems by reintroducing species
done		To maintain biodiversity throughout the world correct
		All answers are correct

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