Sexual Reproduction in Flowering Plants

Perisperm differs from endosperm in

1. being a diploid tissue
2. its formation by fusion of secondary nucleus with several sperms
3. being a haploid tissue
4. having no reserve food.

Advantage of cleistogamy is

1. no dependence on pollinators
2. vivipary
3. higher genetic variability
4. more vigorous offspring.

Megasporangium is equivalent to

1. nucellus
2. ovule
3. embryo sac
4. fruit.

Which one of the following statements is correct?

1. Endothecium produces the microspores.
2. Tapetum nourishes the developing pollen.
3. Hard outer layer of pollen is called intine.
4. Sporogenous tissue is haploid.

Animal vectors are required for pollination in

1. Vallisneria
2. mulberry
3. cucumber
4. maize.

Albuminous seeds store their reserve food mainly in

1. endosperm
2. cotyledons
3. hypocotyl
4. perisperm.

Megaspores are produced from the megaspore mother cells after

1. mitotic division
2. formation of thick wall
3. differentiation
4. meiotic division.

Which one of the following statements is correct?

1. Cleistogamous flowers are always autogamous.
2. Xenogamy occurs only by wind pollination.
3. Chasmogamous flowers do not open at all.
4. Geitonogamy involves the pollen and stigma of flowers of different plants.

Which of the following statements is correct?

1. Sporopollenin can be degraded by enzymes.
2. Sporopollenin is made up of inorganic materials.
3. Sporopollenin can withstand high temperatures as well as strong acids and alkalis.
4. Sporopollenin can withstand high temperatures but not strong acids.

The viability of seeds is tested by :

1. 2,3,5-triphenyl tetrazolium chloride
2. Safranine
3. 2,6-dichlorophenol indophenol
4. DMSO