CBSE
Multiple Choice QuestionsProduct of sexual reproduction generally generates
longer viability of seeds
prolonged dormancy
new genetic combination leading to variation
new genetic combination leading to variation
Which one of the following statements is not true?
Exine of pollen grains is made up of sporopollenin
Pollen grains of many species cause severe allergies
Stored pollen in liquid nitrogen can be used in the crop breeding programmes
Stored pollen in liquid nitrogen can be used in the crop breeding programmes
Read the following statements (IV) and answer the question which follows them
I. In liverworts, mosses and ferns gametophytes are free living.
II) Gymnosperms and some ferns are heterospores.
III) Sexual reproduction in Fucus, Volvox and Albugo is oogamous.
IV) The sporophyte in liverworts is more elaborate than that in mosses.
How many of the above statements are correct?
One
Two
Three
Three
The coconut water from tender coconut represents
fleshy mesocarp
free-nuclear proembryo
free-nuclear endosperm
free-nuclear endosperm
Proximal end of the filament of stamen is attached to the
connective
placenta
thalamus
thalamus
Megasporangium is equivalent to
embryo sac
fruit
nucellus
nucellus
Whic of the following statements is not correct?
Insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbers
Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil
Some reptiles have also been reported as pollinators in some plant species
Some reptiles have also been reported as pollinators in some plant species
In bryophytes and pteridophytes, transport of male gametes requires
insects
birds
water
water
Seed formation without fertilisation in flowering plants involves the process of
budding
Somatic hybridisation
Apomixis
Apomixis
Which one of the following statement is correct?
Hard outer layer of pollen is called intine
Sporogenous tissue is haploid
Endothecium produces the microspores
Endothecium produces the microspores
