Multiple Choice QuestionsAdvantage of cleistogamy is
higher genetic variability
more vigorous offspring
no dependence on pollinators
no dependence on pollinators
C.
no dependence on pollinators
In cleistogamous flowers, anthers and stigma lie close each other. When anthers dehisce in the flower buds, pollen grains come in contact with the stigma to effect pollination. Thus, these flowers produce assured seed set even in the absence of pollinators. The higher genetic variability and more vigorous offsprings are the produced to variations obtained by sexual reproduction. Vivipary relates to the birth of young babies from mammals.
Perisperm differs from endosperms in
being a haploid tissue
having no reserve food
being a diploid tissue
being a diploid tissue
Which one of the following is not the function of the placenta? It
facilitates the supply of oxygen and nutrients to the embryo
secretes oestrogen
facilitates removal of carbon dioxide and waste material from embryo
facilitates removal of carbon dioxide and waste material from embryo
Which is Mendelian idea depicted by a cross in which the F1 generation resembles both the parents?
Incomplete dominance
Law of dominance
Inheritance of one gene
Inheritance of one gene
Filiform apparatus is characteristic feature of
Generative cell
Nucellar embryo
Aleurone cell
Aleurone cell
In angiosperms, microsprogenesis and megasporogenesis
occur in anther
form gametes without further divisions
Involve meiosis
Involve meiosis
Which of the following statements is correct?
The seed in grasses is not endospermic
Mango is a parthenocarpic fruit
A proteinaceous aleurone layer is present in maize grain
A proteinaceous aleurone layer is present in maize grain
Coconut water from a tender coconut is
Immature embryo
Free nuclear endosperm
Innermost layers of the seed coat
Innermost layers of the seed coat
Switch
