Q4 of 49 Page 6

With which type of reproduction do we associate the reduction division? Analyse the reasons for it.

1. Meiosis is known as reduction division because, Meiosis occurs in sexual reproduction, as it is involved in the production of gametes. The gametes are haploid by nature which means that the gametes have half the number of chromosomes than the parents. Hence, the name reduction division.


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2

The number of taxa exhibiting asexual reproduction is drastically reduced in higher plants (angiosperms) and higher animals (vertebrates) as compared with lower groups of plants and animals. Analyse the possible reasons for this situation.

 3

Honeybees produce their young ones only by sexual reproduction. In spite of this, in a colony of bees we find both haploid and diploid individuals. Name the haploid and diploid individuals in the colony and analyse the reasons behind their formation.

 5

Is it possible to consider vegetative propagation observed in certain plants like Bryophyllum, water hyacinth, ginger etc., as a type of asexual reproduction? Give two/three reasons.

 6

'Fertilisation is not an obligatory event for fruit production in certain plants'. Explain the statement.