b4 revision questions › ... · b2 revision cards answer 5 •where an animals’ activity is...
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B2 Revision cards
B2 Revision QuestionsPart 2
B2 Revision cards
Question 1
• Name 2 adaptations of predators
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Answer 1
• Hunting skills, eyes on front of head to judge distances, sharp claws and teeth.
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Question 2
• Name 2 adaptations of prey
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Answer 2
• Eyes on either side of their head, travel in herds/ groups, can move fast
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Question 3
• What is adaptation?
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Answer 3
• A characteristic of an organism that helps it to survive in its habitat.
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Question 4
• What does extinct mean?
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Answer 4
• When all member of a species have died out
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Question 5
• What is hibernation? Why do some animals do this?
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Answer 5
• Where an animals’ activity is lowered due to a lack of food and change in weather conditions.
• They do this to survive when conditions are bad.
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Question 6
• What is migration? Why do some animals do this?
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Answer 6
• Where animals travel long distances due to a change in environmental conditions (heat, food, water)
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Question 7
• What is meant by counter current heat exchange system?
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Answer 7
• Warm blood in one blood vessel passes the cold blood in another and transfers heat, reducing heat loss
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Question 8
• How do animals adapt by hibernating?
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Answer 8
• Lowering their metabolic rate
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Question 9
• What is an extremophile?
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Answer 9
• An organism that can live in extreme conditions (high temperature/ pressure)
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Question 10
• What is a specialist organism?
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Answer 10
• Suited to only one type of habitat
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Question 11
• What is a generalist organism?
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Answer 11
• Can survive in many different habitats with different conditions.
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Question 12
• Name 4 ways that camels are adapted to their environment
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Answer 12
• Hump with fat, long eye lashes, wide feet, thick fur, nose that can close, strong legs, tough lips
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Question 13
• Do you want a high or low surface area: volume ratio if you want to lose more heat?
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Answer 13
• High
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Question 14
• Name 3 ways that fish are adapted
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Answer 14
• Steam-lined, travels in groups, eyes on side of head, gills
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Question 15
• What is evolution?
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Answer 15
• The gradual change in organisms over millions of years caused by mutations and natural selection
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Question 16
• What two things could happen to organisms if an environment changes?
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Answer 16
• Evolve or die out (become extinct)
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Question 17
• Who’s theory of evolution is more widely accepted?
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Answer 17
• Darwin’s
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Question 18
• What is natural selection?
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Answer 18
• Process where ‘good’ characteristics are passed on in genes to become more common
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Question 19
• What are adaptations controlled by?
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Answer 19
• Genes
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Question 20
• Give 2 reasons why the theory of natural selection is now widely accepted.
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Answer 20
• We know more about inheritance and DNA which explains how it works.
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Question 21
• What is meant by the survival of the fittest?
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Answer 21
• Organisms with the right characteristics will survive. If they don’t have them they will
become extinct
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Question 22
• Why do animals produce more young than necessary
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Answer 22
• More chance of some of them surviving and passing on their genes.
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Question 23
• Why did people disagree with Darwin’s theory of evolution to begin with?
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Answer 23
• Contradicted God, not enough evidence, people didn’t believe we evolved from apes
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Question 24
• What is Darwin’s theory of evolution?
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Answer 24
• Organisms evolve by natural selection
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Question 25
• What are the 4 factors in Darwin’s theory natural selection?
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Answer 25
• There is competition for limited resources
• Organisms produce more young than will survive
• Within a species there is natural variation
• Organisms that survive pass on their successful genes to their offspring.
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Question 26
• Give 5 reasons why organisms may be come extinct or endangered
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Answer 26
• Climate change, habitat destruction, hunting, pollution, competition
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Question 27
• State 6 ways for how endangered species can be conserved
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Answer 27
• Protecting habitats, legal protection, education and captive breeding programmes,
seed banks, creating artificial ecosystems
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Question 28
• What natural resources can be sustainably managed?
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Answer 28
• Fish stocks and woodland
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Question 29
• What is speciation?
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Answer 29
• Where a new species is made due to natural selection through geographic or reproductive
isolation
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Question 30
• What are the 2 factors required for speciation?
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Answer 30
• Geographic or reproductive isolation (without breeding within populations)
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Question 31
• Give 4 reasons why we have conservation programmes
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Answer 31
• Protect human food supply, ensuring minimal damage to food chains, cultural aspects,
future identification of plants for medicine
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Question 32
• What is Lamarck’s theory of acquired characteristics?
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Answer 32
• That animals acquired characteristics they needed in their life and passed these on to
their offspring.
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Question 33
• Why was Lamarck’s theory discredited?
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Answer 33
• As we found genes pass on characteristics and changes to you during your life do not change
your genes.
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Question 34
• Why has the theory of natural selection become more developed over the years?
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Answer 34
• We now have a greater understanding of genes and DNA which helps to explain how
the theory works.
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Question 35
• Why did the peppered moth evolve?
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Answer 35
• Pollution changed the colour of tree bark-moths with light colour were more easily
spotted and eaten. The darker coloured ones were more camouflaged so survived and
reproduced.
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Question 36
• What is happening to the size of the human population?
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Answer 36
• It is increasing exponentially
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Question 37
• What does finite mean? Which 2 resources are finite?
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Answer 37
• It is running out. Minerals and fossil fuels
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Question 38
• What happens to the amount of pollution as the population increases?
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Answer 38
• It increases
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Question 39
• What are 4 ways that humans make pollution?
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Answer 39
• Household waste, sewage, sulphur dioxide and carbon dioxide from burning fossil fuels
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Question 40
• Why is the population growing?
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Answer 40
• Birth rate is greater than death rate
• People are living longer due to advances in medicine.
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Question 41
• What is acid rain?
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Answer 41
• Rain water, which is made more acidic by pollutant gases such as sulphur dioxide.
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Question 42
• What is ozone depletion?
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Answer 42
• Where the ozone layer is depleted due to gases (CFC’s)
• This causes more UV radiation to enter the Earths atmosphere – which can lead to sun
burn and skin cancer in humans.
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Question 43
• What species can indicate water pollution if they are present?
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Answer 43
• Waterlouse, sludgeworm, rat-tailed maggot, mayfly larvae
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Question 44
• What species can indicate air pollution if they are present?
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Answer 44
• Lichen
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Question 45
• Describe 2 ways that pollution can be measured
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Answer 45
• Direct measurement of pollutant levels and the presence or absence of certain indicator
species.
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Question 46
• Which countries have a greater impact on the use of resources and creation of pollution?
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Answer 46
• More developed countries
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Question 47
• What is meant by a carbon footprint?
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Answer 47
• The total amount of greenhouse gases given off by a person in a given time
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Question 48
• What are the possible consequences of exponential growth?
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Answer 48
• More gases released, more waste, more food and fuel needed, more sewage
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Question 49
• What is an advantage of using a living method to measure pollution?
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Answer 49
• Cheap and easy- no high tech equipment needed
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Question 50
• What is an disadvantage of using a living method to measure pollution?
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Answer 50
• Can affect wildlife/ damage environment
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