CBSE
Multiple Choice QuestionsAnemophillous flowers have :
sessile stigma
small and smooth stigma
coloured flower
large and feathery stigma
Study of pollen grain is called
Ethmology
Palynology
Palaeobotany
-taxonomy
Assertion : Many visitors to the hills suffer from skin and respiratory allergy problem.
Reason : Conifer trees produce a large quantity of wind-borne pollen grains.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
The plant part which consists of two generations, one within the other, is
genninated pollen grain
embryo
unfertilized ovule
seed
To which of the following flower 'synandrous' condition is found?
Sunflower (Helianthus sp)
Gourd (Cucurbita sp)
Pea (Pisum sativum)
Lemon (Citrus sp)
Scientific name of sunflower is
Hibiscus rosa-sinensis
Solanum nigrum
Oryza sativa
Helianthus annuus
Ornithophily refers to the pollination by which of the following
insects
birds
snails
air
Dispersal of fruits in Opium (poppy) occur through shaking by wind by
explosive mechanism
parachute mechanism
censer mechanism
jacular mechanism
The formation of gametophyte, from sporophyte, without spore formation or without meiosis is known as :
apospory
apogamy
parthenogenesis
none of these
Which of the following is ideal for studying meiosis?
Gamete
Pollen
Microsporangium
Root
