Autogamy = Self Pollination Geitonogamy - (geiton = neighbour, gamos = marriage.) i.e. when pollen grains are transferred to the stigma of other flower of the same plant (i.e. neighbouring flower). Allogamy = Xenogamy – Cross pollination.

Correct Option: D

Autogamy = Self Pollination Geitonogamy - (geiton = neighbour, gamos = marriage.) i.e. when pollen grains are transferred to the stigma of other flower of the same plant (i.e. neighbouring flower). Allogamy = Xenogamy – Cross pollination.

Pollination by insect is known as Entomophily. Among insects bees are the most common pollinators which pollinate about 80% of the total insect pollinated flowers.

Correct Option: B

Pollination by insect is known as Entomophily. Among insects bees are the most common pollinators which pollinate about 80% of the total insect pollinated flowers.

Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus, 25 microspore mother cells are required to produce 100 pollen grains.

Correct Option: A

Each microspore mother cells undergoes meiosis to produce four pollen grains. Thus, 25 microspore mother cells are required to produce 100 pollen grains.

Each microspore mother cell gives rise to 4 microspores which develop into pollen grains.

Correct Option: C

Each microspore mother cell gives rise to 4 microspores which develop into pollen grains.

Transfer of pollen grains by birds is known as ornithophily. They usually have bright coloured flowers, tubular or cup shaped and having a large quantity of nectar.

Correct Option: A

Transfer of pollen grains by birds is known as ornithophily. They usually have bright coloured flowers, tubular or cup shaped and having a large quantity of nectar.