Biology Revision: Evolution 1
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Revision for GCSE Biology. Questions and answers on Evolution Revision Twitter Account: https://twitter.com/BiologyTrivia Video of these slides http://youtu.be/gGCLeDLvxa4
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Natural selection is the driving force behind evolution. According to Charles Darwin's theory of natural selection:
1) There is genetic variation within populations. Traits that increase reproductive success will be passed on more frequently.
2) Individuals with traits better suited to the environment will have greater access to resources and be more likely to reproduce.
3) Over time, individuals with traits that increase reproductive success will comprise a greater proportion of the population, leading populations to evolve.
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What two main ideas did Darwin develop in the \"Origin of Species\"? What is natural
selection? (Look at the lecture powerpoints to answer the question) What are three main points
and important considerations regarding natural selection? What is an adaptation? What are the
two observations and two inferences that explain how natural selection leads to adaptive
evolution? What role did artificial selection play in the development of Darwin\'s logic for
natural selection? What does the theory of evolution suggest will happen when environments
favoring one adaptation change?
Solution
Ques-1: What were the prevailing thoughts about the young Earth and the organisms on it prior
to Darwin
The prevailing thoughts about the young Earth and the organisms on it prior to Darwin are
creatures were created by supernatural power & human are going to control these creatures and
populations are unchanging on the young Earth. Theory of evolution of “Darwin” has produced
specific impact on the imperialism and biblical view of origin of the species finally affected
contemporary philosophical views of religion & creation. These views have changed socio-
economical perspectives in the society about the culture finally changed the “religious views of
humans that “human race has evolved from God’s creation & God’s image”.
Ques-2: What was Darwin\'s big idea?
Answer:
Darwin theory of evolution is completely based on genetic variations and natural selection
operating on the species to acquire adaptations followed by unfit species are going to extinct.
However, here the extinction is not based on designer as it is due to nature. Nature selects
species, which are fit into it followed by elimination that is unfit in nature. It is different from
previous ideas of Earth species diversity, in which creation was completely relies upon myths
and God, the “religious views of humans that “human race has evo.
Understanding Evolution
- Charles Darwin was a British naturalist who developed the theory of evolution by natural selection. He observed species on the Galapagos Islands and noticed finches with different beak shapes that corresponded to their habitats and food sources.
- Influenced by Thomas Malthus' ideas about population growth, Darwin proposed that species evolve over generations through natural selection, where individuals with traits better suited to their environment tend to survive and pass on those traits.
- Darwin spent over 20 years researching and developing his theory before publishing On the Origin of Species in 1859. He provided extensive evidence from his observations and from fossils that species have changed over time, leading to biodiversity. His theory of evolution by natural selection became the
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Evolution by natural selection
Charles Darwin proposed the theory of evolution by natural selection. He observed that populations produce more offspring than can survive, and that variation exists within populations. Individuals with traits better suited to their environment are more likely to survive and reproduce, passing on those traits to subsequent generations over time through the process of natural selection. This results in populations adapting to their environments and evolving over many generations.
IB Biology : 5.2 Natural Selection
Charles Darwin developed the theory of evolution by natural selection after observing that species evolve over generations through natural processes. His theory proposed that species share common ancestors and that traits within a population become more or less common through natural selection as organisms with beneficial traits are more likely to survive and reproduce. The theory can explain how antibiotic resistance has developed in bacteria, as bacteria with genetic mutations that allow survival despite antibiotics will pass on those resistance traits.
Charles Drwin and his Theory Of Evolution
Charles Robert Darwin (1809 -1882) was an English naturalist, geologist and Biologist.
Charles Darwin is also known as Father of natural selection .
Published in his groundbreaking book "On the Origin of Species" in 1859.
Darwin's theory of evolution, first introduced in his book "On the Origin of Species" in 1859
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Biology Revision: Evolution 1
- 2. Question Who wrote 'On the Origin of the Species'? Charles Irwin Richard Dawkins Charles Darwin
- 3. Answer Charles Darwin Charles Darwin explained his ideas on evolution in the book.
- 4. Question Which of these is true? Those with helpful characteristics are more likely to survive to breed Those with least helpful characteristics are more likely to survive to breed Those is no competition for surival and resources between organisms
- 5. Answer Within a species those with helpful characteristics are more likely to survive to breed.
- 6. Question When did the first simple life forms appear on Earth? 1 billion year ago 3 billion year ago 3 thousands years ago
- 7. Answer 3 billion year ago
- 8. Question According to Darwin's theory of evolution, how do new species evolve? Natural Selection. Selection of the Natural Selection Time
- 9. Answer Natural Selection is the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.
- 10. Question Extinction might be caused by which of the following? Removal of a predator. A new predator. More new food sources.
- 11. Answer A new predator is one of many reasons a species may become extinct.
- 12. Question When talking about evolution, what does ‘variation' mean? In any population of organisms there will be some differences In any population of organisms there will be some differences In a populartion all the organisms will have 2 legs
- 13. Answer In any population of organisms there will be some differences
- 14. Question When talking about evolution, what is 'over-production' mean? Many organisms will work in a factory. Many organisms produce more offspring than necessary Many organisms make too many things with their hands
- 15. Answer Many organisms produce more offspring than necessary
- 16. Question When talking about evolution, what is meant by 'struggle for existence'? That all organisms know how to use a gun That there is competition for survival and resources between the organisms That there is no competition for survival and resources between the organisms
- 17. Answer That there is competition for survival and resources between the organisms
- 18. Question Charles Darwin studided variation in plants and animals in which century? 19th century 18th century 20th century
- 19. Answer 19th century. His book was published in 1859.
- 20. Question Which of the following is evidence used to support Darwin's theory of evolution? Changes to DNA Creationism The Bible
- 21. Answer Now we have evidence from DNA and studies on resistant bacteria to help validate the theory of evolution