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Animal migration is described as travel that takes place at regular intervals, often in an annual cycle, and may involve many members of a species, and is rewarded only after a long journey. It suggests inherited ______.
Animal migration is described as travel that takes place at regular intervals, often in an annual cycle, and may involve many members of a species, and is rewarded only after a long journey. It suggests inherited ______.
instinct
Hugh Dingle has identified five characteristics that apply to all migrations: prolonged movements that carry animals outside familiar habitats; they tend to be linear, not ______; they involve special behaviors concerning preparation and arrival; they demand special allocations of ______.
Hugh Dingle has identified five characteristics that apply to all migrations: prolonged movements that carry animals outside familiar habitats; they tend to be linear, not ______; they involve special behaviors concerning preparation and arrival; they demand special allocations of ______.
energy
Migrating animals maintain an intense attentiveness to the greater mission, which keeps them undistracted by temptations and undeterred by challenges. They are driven by an instinctive sense of larger ______.
Migrating animals maintain an intense attentiveness to the greater mission, which keeps them undistracted by temptations and undeterred by challenges. They are driven by an instinctive sense of larger ______.
purpose
An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, resists distraction because it is determined to reach its ______.
An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, resists distraction because it is determined to reach its ______.
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Local gulls will dive voraciously for handouts offered along the way, but the arctic tern flies on undistracted by such ______.
Local gulls will dive voraciously for handouts offered along the way, but the arctic tern flies on undistracted by such ______.
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The arctic tern resists distraction because it is driven by an instinctive sense of a larger ______.
The arctic tern resists distraction because it is driven by an instinctive sense of a larger ______.
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Joe!Berger, of the University of Montana, works on the American pronghorn and other large terrestrial mammals, and prefers a simple, practical definition of migration suited to his beasts: ‘movements from a seasonal home area away to another home area and back again’. Generally the reason for such seasonal back-and-forth movement is to seek resources that aren’t available within a single area year-round. But daily vertical movements by zooplankton in the ocean – upward by night to seek food, downward by day to escape predators – can also be considered ______.
Joe!Berger, of the University of Montana, works on the American pronghorn and other large terrestrial mammals, and prefers a simple, practical definition of migration suited to his beasts: ‘movements from a seasonal home area away to another home area and back again’. Generally the reason for such seasonal back-and-forth movement is to seek resources that aren’t available within a single area year-round. But daily vertical movements by zooplankton in the ocean – upward by night to seek food, downward by day to escape predators – can also be considered ______.
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Migration is a complex issue, and biologists define it differently, depending on what sorts of animals they study. Dingle, an evolutionary biologist who studies insects, has a more intricate definition than Berger’s, citing those five features that distinguish migration from other forms of movement. They allow for the fact that aphids will become sensitive to blue light (from the sky) when it’s time for takeoff on their big journey, and sensitive to yellow light (reflected from tender young leaves) when it’s appropriate to land. Birds will fatten themselves with heavy feeding in advance of a long migrational flight. The value of his definition, Dingle argues, is that it focuses attention on what the phenomenon of wildebeest migration shares with the phenomenon of the aphids, and therefore helps guide researchers towards understanding how evolution has produced them all. Human behaviour, however, is having a detrimental impact on animal ______.
Migration is a complex issue, and biologists define it differently, depending on what sorts of animals they study. Dingle, an evolutionary biologist who studies insects, has a more intricate definition than Berger’s, citing those five features that distinguish migration from other forms of movement. They allow for the fact that aphids will become sensitive to blue light (from the sky) when it’s time for takeoff on their big journey, and sensitive to yellow light (reflected from tender young leaves) when it’s appropriate to land. Birds will fatten themselves with heavy feeding in advance of a long migrational flight. The value of his definition, Dingle argues, is that it focuses attention on what the phenomenon of wildebeest migration shares with the phenomenon of the aphids, and therefore helps guide researchers towards understanding how evolution has produced them all. Human behaviour, however, is having a detrimental impact on animal ______.
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One population of pronghorn spends the summer in the mountainous Grand Teton National Park of the western USA, follows a narrow route from its summer range in the mountains, across a river, and down onto the plains. Here they wait out the frozen months, feeding mainly on sagebrush blown clear of snow. These pronghorn are notable for the inv...
One population of pronghorn spends the summer in the mountainous Grand Teton National Park of the western USA, follows a narrow route from its summer range in the mountains, across a river, and down onto the plains. Here they wait out the frozen months, feeding mainly on sagebrush blown clear of snow. These pronghorn are notable for the inv...
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The pronghorn, which resembles an antelope, though they are unrelated, is the ______ land mammal of the New World.
The pronghorn, which resembles an antelope, though they are unrelated, is the ______ land mammal of the New World.
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Birds will fatten themselves with heavy feeding in advance of a long migrational flight. The value of Dingle's definition is that it focuses attention on what the phenomenon of wildebeest migration shares with the phenomenon of the aphids, and therefore helps guide researchers towards understanding how evolution has produced them all. Human behaviour, however, is having a detrimental impact on animal migration. The pronghorn, which resembles an antelope, though they are unrelated, is the ______ land mammal of the New World. One population, which spends the summer in the mountainous Grand Teton National Park of the western USA, follows a narrow route from its summer range in the mountains, across a river, and down onto the plains. Here they wait out the frozen months, feeding mainly on sagebrush blown clear of snow. These pronghorn are notable for the inv...
Birds will fatten themselves with heavy feeding in advance of a long migrational flight. The value of Dingle's definition is that it focuses attention on what the phenomenon of wildebeest migration shares with the phenomenon of the aphids, and therefore helps guide researchers towards understanding how evolution has produced them all. Human behaviour, however, is having a detrimental impact on animal migration. The pronghorn, which resembles an antelope, though they are unrelated, is the ______ land mammal of the New World. One population, which spends the summer in the mountainous Grand Teton National Park of the western USA, follows a narrow route from its summer range in the mountains, across a river, and down onto the plains. Here they wait out the frozen months, feeding mainly on sagebrush blown clear of snow. These pronghorn are notable for the inv...
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But daily vertical movements by zooplankton in the ocean – upward by night to seek food, downward by day to escape predators – can also be considered ______. So can the movement of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.
But daily vertical movements by zooplankton in the ocean – upward by night to seek food, downward by day to escape predators – can also be considered ______. So can the movement of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.
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