Wind pollination is common in

(1) lilies

(2) grasses

(3) orchids

(4) legumes

Unisexuality of flowers prevents

(1) autogamy, but not geitonogamy

(2) Both geitonogamy and xenogamy

(3) geitonogamy, but not xenogammy

(4) autogamy and geitonogamy

What does the filiform apparatus do at the entrance into ovule?

(1) It helps in the entry of pollen tube into a synergid

(2) It prevents entry of more than one pollen tube into the embryo sac

(3) It brings about opening of the pollen tube

(4) It guides pollen tube from a synergid to egg

Male gametes in angiosperms are formed by the division of:

(1) microspore

(2) generative cell

(3) vegetative cell

(4) microspore mother cell

Long filamentous threads protruding at the end of a young cob of maize are :

(1) anthers

(2) styles

(3) ovaries

(4) hairs

Male gametophyte in angiosperms produces

(1) two sperms and a vegetative cell

(2) single sperm and a vegetative cell

(3) single sperm and two vegetative cells

(4) three sperms

Apomixis is

(1) formation of seeds by fusion of gametes

(2) formation of seed without syngamy and meiosis

(3) formation of seeds with syngamy but no meiosis

(4) none of the above

What is the correct sequence of the formation of female gametophyte in angiosperms?

(1) Nucellus, megapore tetrad, megaspore mother cell, megaspore, female gametophyte

(2) Megaspore tetrad, nucellus, megaspore mother cell, megaspore, female gametophyte

(3) Nucellus, megaspore mother cell, megaspore tetrad, megaspore, female gametophyte

(4) Megaspore mother cell, megaspore tetrad, megaspore, nucellus, female gametophyte

Which among the following is attached to the proximal end of filament?

(1) Stamen

(2) Anther

(3) Petal

(4) Pollen sac

A typical angiosperm bilobed and dithecous anther consists of how many theca?

(1) Two

(2) Four

(3) Eight

(4) Three