Monosporic type - eight nucleated Polygonum type. In this types only one megapore situated at chalazal end takes part in the development of embryosac.
Bisporic type - eight nucleated Allium type. Tetrasporic type - eight nucleated Adoxa type.

Correct Option: D

Monosporic type - eight nucleated Polygonum type. In this types only one megapore situated at chalazal end takes part in the development of embryosac.
Bisporic type - eight nucleated Allium type. Tetrasporic type - eight nucleated Adoxa type.

In gymnosperms the female gametophyte forming archegonia provides nourishment to the developing embryo. It later gets transformed into food-laden endosperm inside the seed. Endosperm provides nourishment for growth of seed at the time of seed germination. Triploid endosperm occurs in angiosperms.

Correct Option: B

In gymnosperms the female gametophyte forming archegonia provides nourishment to the developing embryo. It later gets transformed into food-laden endosperm inside the seed. Endosperm provides nourishment for growth of seed at the time of seed germination. Triploid endosperm occurs in angiosperms.

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.

Vallisneria exhibits hydrophily and Salvia is pollinated by honey bee. In bottle brush pollination is carried out by birds.

Correct Option: D

Vallisneria exhibits hydrophily and Salvia is pollinated by honey bee. In bottle brush pollination is carried out by birds.

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.