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Class 12
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Study of Pollen Germination
Study of Pollen Germination
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1)
What is pollination?
Transference of ovary from the anthers of a flower to the stigma of the same or another flower.
Transference of pollen grain from the stigma of a flower to the anther of the same or another flower.
Transference of pollen grain from the anthers of a flower to the stigma of the same or another flower.
Transference of seeds from one place to another.
2)
Which part of the flower contains pollen?
Filament
Stigma
Anther
Ovary
3)
Which one of the following is not a biotic pollination?
Bird
Animals
Water
Insects
4)
What is the male part of the flower?
Pistil
Stigma
Style
Stamen
5)
What happens to the generative nucleus in the pollen tube of a germinating pollen grain?
Divides to produce two female gametes
Forms two generative nucleus
Divides to produce two male gametes.
Forms tube cells
6)
What is the study of pollen grains called?
Palaeology.
Pantology.
Palaeobiology.
Palynology.
7)
Which of the following statements is not correct?
Pollination is usually carried out by wind, water or insects.
Pollen is produced by the stamen.
Only one tube emerges from a single pollen grain.
Several tubes may emerge from a single pollen grain.
8)
The female gamete is produced by which of the following?
Ovary
Anther
Stamen
Stigma
9)
Why is sucrose used as a medium for pollen germination?
All of the statements are correct.
In nature pollen grain germinates in response to a sugary fluid secreted by the mature stigma.
Sucrose provides a carbon energy source that can initiate pollen metabolism.
Sucrose maintains the osmotic pressure to prevent the bursting and collapse of pollen grains.
10)
What does the the part labeled A represent?
Male gamete
Generative cell
Tube nucleus
Female gamete
