Page 2 - Assignment-Sexual Reproduction in flowering plantsFormat - Copy (2)
P. 2
8. The stalk of Datura flower at its base is known as
1. Pedicel
2. Corolla
3. Sepals
4. Thalamus
9. The male reproductive parts of a flower, the stamens, are collectively known as
1. Androecium
2. Filament
3. Anther
4. Gynoecium
10. The other name for gynoecium is
1. Pistil
2. Stigma
3. Androecium
4. Style
B. Very Short Answer Questions (1 mark each)
1. In a young anther, a group of compactly arranged homogenous cells were observed in
thecentre of each microsporangium. What is the name given to these cells?
2. Give the scientific name of a plant which came to India as a contaminant with imported
wheatand causes pollen allergy.
3. Pollen grains of water pollinated species have a special characteristics for protection
from water.What is that?
4. Why are pollen grains produced in enormous quantity in Maize?
5. In same species of Asteraceae and grasses, seed are formed without fusion of
gametes. Mentionthe scientific term for such form of reproduction.
6. Arrange the following in correct developmental sequence :
Male gamete, Potential pollen mother cell, sporogenous tissue, Pollen grains,
Microspore tetrad.
7. If the diploid number of chromosomes in an angiospermic plant is 16. Mention number
ofchromosomes in the endosperm and antipodal cell.
C. Short Answer Questions-II (2 marks each)
8. In angiospermic plant before formation of microspore sporogenous tissue undergo cell
division
(a) Name the type of cell division.
(b) What would be the ploidy of the cells of tetrad?
9. Outer envelop of pollen grain made of a highly resistant substance. What is that
substance? Atwhich particular point the substance is not present?
