Arrange the following terms in the correct developmental sequence. Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes.

Name the process of formation of microspore from pollen mother cells.

A mature male gametophyte is formed from pollen mother cell by :

Study carefully the following stages of life cycle of malarial parasite i.e., Plasmodium. Arrange these stages in the correct sequence and select the correct answer. 1. Sporozoites leave the blood stream and enter the liver cells of man. 2. Sporozoites present in the salivary glands of female Anopheles mosquito are injected into the blood stream of man. 3. The parasite reproduces asexually in RBCs, resulting in bursting of RBCs and causing the cycles of fever, relased parasites infect new RBCs. 4. The parasite reproduces asexually in liver cells, ultimately causing the rupturing of cells. 5. Two types of gametocytes i.e., microgametocytes and macrogametocytes develop in the RBCs. 6. Female Anopheleles mosquito takes up the gametocytes with blood meal of an infected person. 7. Mature infective stage of the parasite i.e., sporozoites escape from intestine and migrate to the mosquito's salivary glands. 8. Fertilisation and developmental stages of the parasite take place in mosquito's stomach.

Read the following statements and select the correct option. Statement 1 : In pea plant, transfer of pollen grains to the stigma is easy. Statement 2 : In cross pollinating plants, pollination does not take place.

_______of the pollen grain divides to form two male gametes.

Study the following statements and select the correct option. (i) Tapetum nourishes the developing pollen grains. (ii) Hilum represents the junction between ovule and funicle. (iii) In aquatic plants such as water hyacinth and waterlily, pollination occurs by water. (iv) The primary endosperm nucleus is triploid.

In grasses what happens in microspore mother cell for the formation of mature pollen grains :

What is the function of the two male gametes produced by each pollen grain in angiosperms?

Given below are the events that are observed in an artificial hybridisation programme. Arrange them in the correct sequential order and select the correct option. 1. Re-bagging 2.Selection of parents 3. Bagging 4. Dusting the pollen on stigma 5. Emasculation 6. Collection of pollen from male parent