Heredity and evolution Worksheet-17
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Explain why evolution cannot be said to progress from lower forms to higher forms.
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How environment determines sex of a new born in some organism?
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How do DNA help in defining evolutionary relationship?
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Give two examples of organisms in which environmental factors regulate sex determination.
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"Genes and chromosomes have similar behaviour." Justify.
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Name the scientific terms used to represent the following :
(a) The branch of biology which studies heredity and variation.
(b) The transmission of traits from parents to offsprings.
(c) Differences in a trait in human beings.
(d) A recognisable feature of an organism.
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Why are asexually reproducing organisms capable of showing the hereditary features more?
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What was the plant chosen by Mendel to work upon? What was his observation?
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What do genes have to do with evolution?
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How does the creation of variations in a species ensure survival?
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Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
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What factors could lead to the rise of a new species?
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Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
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Why are human beings who look so different from each other in terms of size, colour and looks said to belong to the same species?
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Outline a project which aims to find the dominant coat colour in dogs.
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What evidence do we have for the origin of life from inanimate matter?
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How is the equal genetic contribution of male and female parents insured in the progeny?
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Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?
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Define 'evolution'. Describe Darwin's theory of evolution.
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Explain the mechanism of sex determination in the zygote.
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Define fossils. Explain briefly any two ways in which the study of fossils helps in under-standing about the past life.
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Name any three organs homologous to human hand. Why are they considered homologous?
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What are homologous organs? How do they provide evidence in support of evolution?
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What is the significance of homologous and analogous organs in the process of evolution?
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Who was Mendel? Why was he called the 'Father of Genetics'?
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Define the term 'heredity'. In which types of organisms is heredity supposed to be better defined - in sexually reproducing or asexually reproducing kind? Why?
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Explain how a new species is generated.
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Explain with an example, how evolutionary relationship linked to classification.
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How are fossils formed?
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Explain various stages of evolution.