Biology
Grade-8
Easy
Question
Manipulating the arrangement of DNA that makes up a gene is called
- Genetic engineering
- Chromosomal migration
- Viral reproduction
- Cross breeding
Hint:
Genetic engineering is a process that uses laboratory based technologies to alter the DNA makeup of an organism.
The correct answer is: Genetic engineering
Genetic engineering is a process that uses laboratory based technologies to alter the DNA make up of an organism. This may involve changing a single base pair A-T or C-G, deleting a region of DNA or adding a new segment of DNA.
Related Questions to study
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Crops are modified to:
Crops are modified to:
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___________ is the first genetically engineered medicine.
___________ is the first genetically engineered medicine.
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What is the correct word to describe the entire genetic material of an organism?
What is the correct word to describe the entire genetic material of an organism?
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Insulin can be genetically engineered by:
Insulin can be genetically engineered by:
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The section of DNA that codes for a protein is called:
The section of DNA that codes for a protein is called:
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The theory that organisms acquire traits during their lifetime that help them adapt to their environment is called _____.
- The theory that organisms acquire traits during their lifetime helps them to adapt their environment is called the theory of acquired characteristics.
- This theory was given by a scientist Lamarck. This is also called lamarckism.
- This theory was proved false as the changes acquired in life time are not at genetic level and can not be passed to the next generation.
- Only characteristics that helps organisms to adapt are found at genetic level.
The theory that organisms acquire traits during their lifetime that help them adapt to their environment is called _____.
BiologyGrade-8
- The theory that organisms acquire traits during their lifetime helps them to adapt their environment is called the theory of acquired characteristics.
- This theory was given by a scientist Lamarck. This is also called lamarckism.
- This theory was proved false as the changes acquired in life time are not at genetic level and can not be passed to the next generation.
- Only characteristics that helps organisms to adapt are found at genetic level.
Biology
The changes that occur over long periods of time in the characteristics of an organism and enable diversity.
- Small but significant changes that occur with long period of time help the organisms to adapt.
- These changes makes the organism to survive in their environment.
- These gradual changes are passed to next generations and help the organism to evolve.
- The organism becomes different to the others. This is called diversity.
- This process is called evolution.
The changes that occur over long periods of time in the characteristics of an organism and enable diversity.
BiologyGrade-8
- Small but significant changes that occur with long period of time help the organisms to adapt.
- These changes makes the organism to survive in their environment.
- These gradual changes are passed to next generations and help the organism to evolve.
- The organism becomes different to the others. This is called diversity.
- This process is called evolution.
Biology
Survival of the fittest and evolution were proposed by which scientist?
- Charles Darwin proposed survival of the fittest and evolution.
- He was traveling through the Galapagos islands. He observes the organisms properly.
- He noticed several varieties in organisms of different places.
- Based on his observations he proposed the concepts of natural selection, survival of the fittest, and evolution.
- These theories are related to each other and describe the process of development of a variety of organisms
Survival of the fittest and evolution were proposed by which scientist?
BiologyGrade-8
- Charles Darwin proposed survival of the fittest and evolution.
- He was traveling through the Galapagos islands. He observes the organisms properly.
- He noticed several varieties in organisms of different places.
- Based on his observations he proposed the concepts of natural selection, survival of the fittest, and evolution.
- These theories are related to each other and describe the process of development of a variety of organisms
Biology
A grizzly bear survives because he is well-adapted to his environment. When he reproduces, he passes the traits to his offspring, this process is called _____.
- Charles Darwin, first of all, suggested that animals of the same geographical area show varieties in their traits.
- These varieties help the animals to struggle and live in their environment.
- This is called adaptation.
- These varieties are developed at genetic level and when these animals reproduce these traits are passed to the next generation in form of genes.
- This is called natural selection.
- It helps the animals to evolve.
A grizzly bear survives because he is well-adapted to his environment. When he reproduces, he passes the traits to his offspring, this process is called _____.
BiologyGrade-8
- Charles Darwin, first of all, suggested that animals of the same geographical area show varieties in their traits.
- These varieties help the animals to struggle and live in their environment.
- This is called adaptation.
- These varieties are developed at genetic level and when these animals reproduce these traits are passed to the next generation in form of genes.
- This is called natural selection.
- It helps the animals to evolve.
Biology
Which of the following is an example of selective breeding?
- Selective breeding is not a natural process but a human cause.
- In this process, animals do not breed randomly.
- So, in the given options giraffe's long neck is an example of natural selection.
- Labrador retriever and poodle are two different breeds of dogs.
- Labrador dog is a breed of retriever gun dog while poodle is a breed of water dog.
- These both when crossed produce a mix called Labradoodle.
- So this is an example of selective breeding.
Which of the following is an example of selective breeding?
BiologyGrade-8
- Selective breeding is not a natural process but a human cause.
- In this process, animals do not breed randomly.
- So, in the given options giraffe's long neck is an example of natural selection.
- Labrador retriever and poodle are two different breeds of dogs.
- Labrador dog is a breed of retriever gun dog while poodle is a breed of water dog.
- These both when crossed produce a mix called Labradoodle.
- So this is an example of selective breeding.
Biology
All farm animals were created by......
- Farm animals are created by artificial selection or selective breeding.
- Like chicks, goats, camels, and pigs are raised to get products of commercial use like milk or meat.
- So, farmers want phenotypic traits in these animals like more milk production and more meat mass.
- To get such phenotypic traits in animals they are bred with selective animals and this is called artificial selection.
- For example variety of dogs were developed from wild wolves.
All farm animals were created by......
BiologyGrade-8
- Farm animals are created by artificial selection or selective breeding.
- Like chicks, goats, camels, and pigs are raised to get products of commercial use like milk or meat.
- So, farmers want phenotypic traits in these animals like more milk production and more meat mass.
- To get such phenotypic traits in animals they are bred with selective animals and this is called artificial selection.
- For example variety of dogs were developed from wild wolves.
Biology
Why is artificial selection important to understand evolution?
Why is artificial selection important to understand evolution?
BiologyGrade-8
Biology
GMO stands for _____.
- GMO stands for genetically modified organisms.
- Such organisms have genetic material which is slightly different than their actual form.
- Human for some desired phenotypic characteristics in an organism manipulates their genes (DNA or RNA).
- This manipulation is done on a molecular level by adding or deleting the part of DNA or RNA (gene) or sometimes by changing the structure of the gene.
GMO stands for _____.
BiologyGrade-8
- GMO stands for genetically modified organisms.
- Such organisms have genetic material which is slightly different than their actual form.
- Human for some desired phenotypic characteristics in an organism manipulates their genes (DNA or RNA).
- This manipulation is done on a molecular level by adding or deleting the part of DNA or RNA (gene) or sometimes by changing the structure of the gene.
Biology
Artificial selection decreases diversity. This is a disadvantage because:
- When selective breeding is performed in plants or animals since a long time. The organisms of a population will have lesser diversity and more similarity.
- All the organisms of the population will have same traits as selective breeding is performed for this purpose (to achieve desirable characters which are beneficial for human.
- So, this process does not support evolution. There will not be variety in organisms.
- Varieties in organisms are required for them evolve.
- These variations help them to adapt in the environment and survive.
- Similar traits in organisms leads to the extinction of them.
- Also, selective breeding causes several health-related problems in animals.
Artificial selection decreases diversity. This is a disadvantage because:
BiologyGrade-8
- When selective breeding is performed in plants or animals since a long time. The organisms of a population will have lesser diversity and more similarity.
- All the organisms of the population will have same traits as selective breeding is performed for this purpose (to achieve desirable characters which are beneficial for human.
- So, this process does not support evolution. There will not be variety in organisms.
- Varieties in organisms are required for them evolve.
- These variations help them to adapt in the environment and survive.
- Similar traits in organisms leads to the extinction of them.
- Also, selective breeding causes several health-related problems in animals.
Biology
In the process of selective breeding of food crops, what might a farmer look for?
- Selective breeding is performed to achieve desired characters in crops.
- A farmer wants to develop such variety of crops with high yields and good nutritional value. So, the crop should be producing large sized grains and more grains in quantity.
- So according to consumer's demand the farmer wants to produce a variety of crop which is disease resistant, to reduce loss in crop production.
In the process of selective breeding of food crops, what might a farmer look for?
BiologyGrade-8
- Selective breeding is performed to achieve desired characters in crops.
- A farmer wants to develop such variety of crops with high yields and good nutritional value. So, the crop should be producing large sized grains and more grains in quantity.
- So according to consumer's demand the farmer wants to produce a variety of crop which is disease resistant, to reduce loss in crop production.