Accumulation of Variations
Accumulation of Variations
We have different organisms all around us. They all look different as species differ from each other. But when you look for differences among individuals of a species, no two individuals are identical to each other. We acquire a common body design along with subtle changes. Take an example of bacteria.
There would be only very minor differences between them, generated due to small inaccuracies in DNA copying mechanism, the diversities quite high in case of sexually reproducing organisms because of reshuffling of traits during gamete formation and chance fusion of gametes during fertilisation. If the DNA comes from two parents, the differences will be pronounced. The earlier differences will pass on to the next generation's offspring as well as the new ones they inherit from their parents.
Which of the following are correct ? (a) Bacterium produces two bacteria by asexual reproduction. (b) Variations in an individual may be an advantage or a disadvantage for the organism. (c) The advantage of variation in sexual reproduction is that the variations accumulated in the gametes of each sex are combined when they fuse to form the zygote | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) The advantage of variation to a species is that it decreases the chance of its survival in a changing environment. (b) As gametes and zygote formation are not involved, the asexually produced offspring are quite similar. (c) Significance of the variation is that they form the basis of heredity . | |||
| Right Option : B | |||
| View Explanation | |||
An offspring produced from the zygote receives and carries the variations of ________________________ | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [20]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
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Aman Kumar Shrivastava
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Ayan Ghosh
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Om Umang
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
