English-2
Grade-8
Easy

Question

Which among the following statement is correct?

  1. The rough draft is a perfectly structured, publishable piece.
  2. The rough draft should be simply written without too much thought.
  3. The rough draft should be well-thought-out.
  4. None of the above

The correct answer is: The rough draft should be well-thought-out.


    The rough draft should be based on enough brainstorming of ideas. Therefore, it should be well-thought-out.

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    The rough draft is also known as

    The rough draft is also known as

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    Offspring produced from two different parent types, breeds, or species

    • The offspring of two different parents that are from different breeds or species is called a hybrid. 
    • Both parents of different types or breeds or species have different genetic compositions.
    • They are having different alleles for their genes. 
    • So as a result of sexual reproduction the produced offspring is having different alleles at the same loci for a gene. They are heterozygous.
    • Also, these offspring have more new genetic combinations and thus more new traits.
    • So, that's why these are called hybrids. 

    Offspring produced from two different parent types, breeds, or species

    BiologyGrade-8

    • The offspring of two different parents that are from different breeds or species is called a hybrid. 
    • Both parents of different types or breeds or species have different genetic compositions.
    • They are having different alleles for their genes. 
    • So as a result of sexual reproduction the produced offspring is having different alleles at the same loci for a gene. They are heterozygous.
    • Also, these offspring have more new genetic combinations and thus more new traits.
    • So, that's why these are called hybrids. 

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    Biology

    Which of the following best represents inbreeding?

    • The organisms which are closely related means have common ancestors and have many similarities in their genomes.
    • Because of the same genes most of their traits are similar too.
    • So, inbreeding represents crossing or sexual reproduction between similar animals.

    Which of the following best represents inbreeding?

    BiologyGrade-8

    • The organisms which are closely related means have common ancestors and have many similarities in their genomes.
    • Because of the same genes most of their traits are similar too.
    • So, inbreeding represents crossing or sexual reproduction between similar animals.

    parallel
    Grade-8
    Biology

    Which of the following is NOT a result of selective breeding?

    • Insects often match the color of the environment they live.
    • This is a kind of adaptation.
    • Matching with the color of the environment helps them to hide from the prey.
    • So, this kind of change is developed only through natural selection.
    • Because these traits help insects to survive.
    • So this can not be a result of selective breeding.

    Which of the following is NOT a result of selective breeding?

    BiologyGrade-8

    • Insects often match the color of the environment they live.
    • This is a kind of adaptation.
    • Matching with the color of the environment helps them to hide from the prey.
    • So, this kind of change is developed only through natural selection.
    • Because these traits help insects to survive.
    • So this can not be a result of selective breeding.

    Grade-8
    Biology

    Problems with selective breeding include:

    • Selective breeding includes processes of inbreeding and hybridization.
    • This causes lesser diversity in animals.
    • The animals in a population have the same kind of traits and there will be a lack of variety.
    • The animals will not be able to evolve.
    • During natural selection, such changes or variations are developed in animal that helps them to survive in changing environments.
    • But in the absence of natural selection, such variations will not develop and they won't be able to survive in changing conditions.
    • So there will be health problems.

    Problems with selective breeding include:

    BiologyGrade-8

    • Selective breeding includes processes of inbreeding and hybridization.
    • This causes lesser diversity in animals.
    • The animals in a population have the same kind of traits and there will be a lack of variety.
    • The animals will not be able to evolve.
    • During natural selection, such changes or variations are developed in animal that helps them to survive in changing environments.
    • But in the absence of natural selection, such variations will not develop and they won't be able to survive in changing conditions.
    • So there will be health problems.

    Grade-8
    Biology

    The image shows that the wolf is the ancestor to all the breeds of dogs shown below. How did this variation arise in a relatively short period of time?

    • Through a selective breeding variety of dogs are developed from a common wolf ancestor.
    • Through selective breeding or artificial selection, we can get new varieties in a short period as it is not a natural process.
    • For the domestication of animals, such varieties are developed from wild varieties of animals.

    The image shows that the wolf is the ancestor to all the breeds of dogs shown below. How did this variation arise in a relatively short period of time?

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    • Through a selective breeding variety of dogs are developed from a common wolf ancestor.
    • Through selective breeding or artificial selection, we can get new varieties in a short period as it is not a natural process.
    • For the domestication of animals, such varieties are developed from wild varieties of animals.

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    Artificial selection is  ______.

    • Artificial selection was discovered and explained by scientist Charles Darwin in the 19th century.
    • But this process is not a new one and has been used for thousands of years ago.
    • Ancient humans developed different breeds of animals and plants from wild ancestors. 
    • They developed breeds of animals for domestication and plants for crop production.
    • They were familiar with the results of inbreeding and hybridization.

    Artificial selection is  ______.

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    • Artificial selection was discovered and explained by scientist Charles Darwin in the 19th century.
    • But this process is not a new one and has been used for thousands of years ago.
    • Ancient humans developed different breeds of animals and plants from wild ancestors. 
    • They developed breeds of animals for domestication and plants for crop production.
    • They were familiar with the results of inbreeding and hybridization.

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    Biology

    Identify the type of selection in the given image.

    • The variety of corns are developed through selective breeding.
    • Ancient human developed such breeds of corn according to their needs and benefits.
    • Through inbreeding and hybridization such varieties are developed.
    • These varieties are able to grow in different soil and climatic conditions. Also, these are resistant for water loss. 

    Identify the type of selection in the given image.

    BiologyGrade-8

    • The variety of corns are developed through selective breeding.
    • Ancient human developed such breeds of corn according to their needs and benefits.
    • Through inbreeding and hybridization such varieties are developed.
    • These varieties are able to grow in different soil and climatic conditions. Also, these are resistant for water loss. 

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    Identify the type of selection in the given image.

    • The given image represents that different animals evolved from the same ancestors, and become different in appearance due to migrating to different geographical areas like India, China, America, and Europe.
    •  In the second generation, these animals are more varied.
    • These variations are caused by random mating in these animals. 
    • These variations help these animals to adapt according to the environment.
    • So, natural selection can be noticed here as a result of random mating.

    Identify the type of selection in the given image.

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    • The given image represents that different animals evolved from the same ancestors, and become different in appearance due to migrating to different geographical areas like India, China, America, and Europe.
    •  In the second generation, these animals are more varied.
    • These variations are caused by random mating in these animals. 
    • These variations help these animals to adapt according to the environment.
    • So, natural selection can be noticed here as a result of random mating.

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    Artificial selection is also known as________.

    • Artificial selection is a process in which humans identify some desirable traits in organisms and through selective breeding, these traits are accumulated in the next generations of organisms.
    • Natural selection is caused by random mating while artificial selection is caused by selective breeding.
    • Human started the domestication of organisms that are beneficial to them many years ago. Some traits are useful for humans while some are not.
    • So, the process of artificial selection allows human to grow plants with desirable traits and to keep the domestic animals with desired traits. 

    Artificial selection is also known as________.

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    • Artificial selection is a process in which humans identify some desirable traits in organisms and through selective breeding, these traits are accumulated in the next generations of organisms.
    • Natural selection is caused by random mating while artificial selection is caused by selective breeding.
    • Human started the domestication of organisms that are beneficial to them many years ago. Some traits are useful for humans while some are not.
    • So, the process of artificial selection allows human to grow plants with desirable traits and to keep the domestic animals with desired traits. 

    Which of the following is a similarity between artificial selection and natural selection?

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    In artificial selection ‘Selective Breeding’ is a necessary process due to earth’s population. Why is artificial selection important for humanity? Artificial selection has been a key factor in the evolution of:

    In artificial selection ‘Selective Breeding’ is a necessary process due to earth’s population. Why is artificial selection important for humanity? Artificial selection has been a key factor in the evolution of:

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    Artificial selection has been a key factor in the evolution of:

    Artificial selection has been a key factor in the evolution of:

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    What is an example of artificial selection?
     

    What is an example of artificial selection?
     

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    Which of the following solvent can be used to separate common salt from sulphur powder without using water as solvent?

    Which of the following solvent can be used to separate common salt from sulphur powder without using water as solvent?

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