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B6: Quiz 9 – Answers
B6: Quiz 9 – Answers
1) Mutations in the genetics of organisms leads to variation in the population. Any advantageous mutation means that the organism is more suited to their environment and are therefore more likely to survive. If they are more likely to survive, they are more likely to reproduce and pass these advantageous genes/ characteristics onto future generations – this will result in these characteristics becoming more prolific (common) in the species. Any disadvantageous mutation means that an organism is less suited to their environment and are therefore less likely to survive. If they are less likely to survive, they are less likely to reproduce and pass these disadvantageous genes/ characteristics onto future generations – this will result in these characteristics becoming less prolific (common) in the species.
2) The rabbit with longer ears will hear the fox coming quicker and run away, thus meaning that it is more likely to survive. As the long-eared rabbit is more likely to survive, it is more likely to reproduce and pass the long-eared gene/ characteristic onto future generations. This will result in the long-eared characteristic becoming more prolific (common) in the species; there will be more long-eared rabbits on the island. Therefore, rabbit ear size on the island will become longer
You could also say,
The short-eared rabbits will hear the fox slower than the long-eared rabbits. This means that the short-eared rabbits are more likely to get eaten and not survive. As the short-eared rabbits are less likely to survive, they are less likely to reproduce and pass the short-eared gene/ characteristic onto future generations. This will result in the short-eared characteristic becoming less prolific (common) in the species; there will be fewer short-eared rabbits on the island.
3) Fossils and antibiotic resistant bacteria
4)
a) Speciation
b) No – different species cannot reproduce to produce fertile offspring
5)
a) Extinction is where a species does not exist anymore
b) The five factors are:
2) The rabbit with longer ears will hear the fox coming quicker and run away, thus meaning that it is more likely to survive. As the long-eared rabbit is more likely to survive, it is more likely to reproduce and pass the long-eared gene/ characteristic onto future generations. This will result in the long-eared characteristic becoming more prolific (common) in the species; there will be more long-eared rabbits on the island. Therefore, rabbit ear size on the island will become longer
You could also say,
The short-eared rabbits will hear the fox slower than the long-eared rabbits. This means that the short-eared rabbits are more likely to get eaten and not survive. As the short-eared rabbits are less likely to survive, they are less likely to reproduce and pass the short-eared gene/ characteristic onto future generations. This will result in the short-eared characteristic becoming less prolific (common) in the species; there will be fewer short-eared rabbits on the island.
3) Fossils and antibiotic resistant bacteria
4)
a) Speciation
b) No – different species cannot reproduce to produce fertile offspring
5)
a) Extinction is where a species does not exist anymore
b) The five factors are:
- A disease kills them
- A new predator kills them
- The environment changes too quickly
- They cannot compete with another species for resources like food, light, water etc…
- An event kills them like an asteroid strike, a tsunami or a volcanic eruption
Questions
1) Discuss the theory of evolution by natural selection. Say quite a lot.
2) A group of rabbits live on an island. The rabbits can die by being eaten by foxes. There is a mutation that results in a rabbit having longer ears – these longer ears allow the rabbit to hear the fox quicker. Discuss what will happen to the size of rabbit ears in the population of rabbits on the island.
3) Give two different sources of evidence to support Darwin’s theory of evolution by natural selection.
4) The phenotype of organisms can change so much over time that a new species is created.
a) What is the name of this process?
b) Can different species reproduce with each other to produce fertile offspring?
5)
a) What does extinction mean?
b) Give the five factors that can lead to the extinction of a species. You do not need to explain each of the five factors.
1) Discuss the theory of evolution by natural selection. Say quite a lot.
2) A group of rabbits live on an island. The rabbits can die by being eaten by foxes. There is a mutation that results in a rabbit having longer ears – these longer ears allow the rabbit to hear the fox quicker. Discuss what will happen to the size of rabbit ears in the population of rabbits on the island.
3) Give two different sources of evidence to support Darwin’s theory of evolution by natural selection.
4) The phenotype of organisms can change so much over time that a new species is created.
a) What is the name of this process?
b) Can different species reproduce with each other to produce fertile offspring?
5)
a) What does extinction mean?
b) Give the five factors that can lead to the extinction of a species. You do not need to explain each of the five factors.