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Yogita Ingle 5 years, 1 month ago
Sexual reproduction involves the fusion of the male and the female gamete. This fusion allows the formation of new variants by the combination of the DNA from two (usually) different members of the species. The variations allow the individuals to adapt under varied environmental conditions for better chances of survival.
However, it is not always necessary that the offspring produced due to sexual reproduction has better chances of survival. Under some circumstances, asexual reproduction is more advantageous for certain organisms. For example, some individuals who do not move from one place to another and are well settled in their environment. Also, asexual reproduction is a fast and a quick mode of reproduction which does not consume much time and energy as compared to sexual reproduction.
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Yogita Ingle 5 years, 3 months ago
Ozone layer is a protective layer in the stratosphere. It protects the earth's inhabitants from the harmful UV rays of the sun which if not blocked may cause skin cancer. The ultraviolet rays split the oxygen molecule into free oxygen atoms, these free oxygen atoms combine with the oxygen molecule to form ozone. This salient layer lies at distance of 12-15 miles beyond the earth surface.
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Yogita Ingle 5 years, 4 months ago
Reproduction is defined as a biological process in which every living organism give rise to new organisms similar to themselves.
Basic features of reproduction:
(i) Replication of DNA
(ii) Cell division (only mitotic, or both mitotic and meiotic)
(iii) Formation of reproductive bodies or units.
(iv) Development of reproductive bodies into offsprings.
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Yogita Ingle 4 years, 10 months ago
Measures to reduce noise pollution:
(i) Use of loudspeaker to be avoided.
(ii) Should not talk too loudly or play TV/ music too loudly.
(iii) Do not play music too loud while driving or use horn unnecessarily.
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