WorksheetsSexual Reproduction in Flowering Plants
Total questions: 10
Worksheet time: 5mins
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
Lignin
Cellulose
Cuticle
Sporopollenin
Both, autogamy & geitonogamy are prevented in
Castor
Maize
Papaya
Cucumber
even in absence of pollinating agents seed setting is assured in
Salvia
Fig
Commellina
Zostera
What is the function of germ pore?
Emergence of radicle
Absorption of water for seed germination
Initiation of pollen tube
Release of male gametes
Which one of the following statements is wrong?
When pollen is shed at two-celled stage, double fertilization does not take place
Vegetative cell is larger than generative cell
Pollen grains in some plants remain viable for months
Intine is made up of cellulose and pectin
Plants with ovaries having only one or few ovules, are generally pollinated by
Bees
Butterflies
Birds
Wind
Perisperm differs from endosperm in
Having no reserve food
Being a diploid tissue
Its formation by fusion of secondary nucleus with several sperms
Being a haploid tissue
Advantage of cleistogamy is
More vigorous offspring
No dependance on pollinators
Vivipary
Higher genetic variability
Function of filiform apparatus is
Recognize the suitable pollen at stigma
Stimulate division of generative cell
Produce nector
Guide the entry of pollen tube
Genetically self but functionally cross pollination is
Autogamy
Allogamy
Geitonogamy
Xenogamy
