Science
Puneet wanted to grow banana plants.
(a) Based on your knowledge on plant reproduction should he opt for seeds or any alternate method of reproduction. Justify your answer.
(b) Offsprings of a banana plant usually show very little variation. What causes variation and are variations good or bad? Justify.
Reproduction in Plants
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Answer
(a) Puneet should not choose seeds because modern banana plants have lost the ability to produce viable seeds. Instead, he should use an alternate method of reproduction, such as vegetative propagation through stem cuttings or suckers.
(b) The offspring of banana plants show very little variation because they are produced through asexual reproduction (vegetative propagation), where no fusion of gametes or exchange of genetic material takes place.
However, variations can still arise due to errors during DNA copying which can be beneficial or harmful :
- Beneficial variations help some individuals survive under unfavourable conditions such as diseases or environmental changes.
- Harmful variations may lead to the loss of desirable traits or make the plant less adaptable to its surroundings.
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Related Questions
Neha consumed boiled sweet potatoes and boiled eggs for breakfast. Help her to understand some steps in the process of digestion of the food taken by her by answering the questions given below.
Attempt either subpart A or B.
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OR
(b) Which of these food items contains fats? How is it digested?
(c) Which of these food items is rich in starch? How is its digestion initiated?
(d) The figure given below represents parts of the human alimentary canal. Which of these parts will have the maximum amount of digested food as soon as the process of digestion is completed?
Neha consumed boiled sweet potatoes and boiled eggs for breakfast. Help her to understand some steps in the process of digestion of the food taken by her by answering the questions given below.
Attempt either subpart A or B.
(a) Which of these food items is rich in proteins? In which part of the alimentary canal is the digestion of this component initiated? Name the enzymes, conditions required and the glands associated with the digestion here.
OR
(b) Which of these food items contains fats? How is it digested?
(c) Which of these food items is rich in starch? How is its digestion initiated?
(d) How will the digested food be taken up by the alimentary canal?
Annie was conducting research on the number of fruits produced by watermelon under different conditions. She grew 25 watermelon plants each in both glass house A and B. She introduced pollinators in glass house A only.
(a) What difference will she observe in the number of fruits produced in the two glass houses? Explain with reason.
(b) List 3 changes that will occur in a flower once it gets fertilized.
Which of the following equations represent redox reactions and what are the values for ‘p’ and ‘q’ in these equations?
- Equation 1 :
- Equation 2 :
options
- Only equation 1 is a redox reaction, p = 1 and q = 3
- Both equations 1 and 2 are redox reactions, p = 2 and q = 4
- Only equation 2 is a redox reaction, p = 2 and q = 10
- Both equations 1 and 2 are redox reactions, p = 2 and q = 10