The diagram given below shows the transverse section of a young anther. Identify the parts a,b,c and d.

(b) The developmental stages of male gametes in plants consist of microsporogenesis and male gametophyte. Arrange the following terms in their correct development sequence.
Pollen grain
Sporogenous tissue
Anther
Microspore tetrad
Pollen mother cell
Male gamete

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

Given below are the steps of controlled cross-pollination: a. Collection of pollen from male parent b. Bagging c. Selection of parents d. Emasculation e. Dusting of pollens on stigma f. Rebagging Which among the following options show correct order sequence?

Read the following statements carefully and select the appropriate option given below. (i) The distal end of the filament is attached to the thalamus or the petal of the flower. (ii) The pollen grains represent the male sporophyte. (iii) The microsporangia develop further and become embryo sac. (iv) In over 60 per cent of naked seeded plant, pollen grains are shed at this 2-celled stage. (v) As anthers mature and dehydrate the microspores, dissociate from each other and develop into pollen grains.

Read the following statements and find out the incorrect statements. a. In majority of organisms, male gamete is motile and female gamete is non-motile (stationary). b. In algae and fungi, both male and female gametes are non-motile. c. In seed plants, pollen grains are the carrier of male gametes and ovule has the egg. d. In dioecious plants, pollination facilitates transfer of pollen grains to the stigma. e. In monoecious animals, since male and female gametes are formed in different individuals, the or ganism must evolve special mechanism for gamete transfer.

Read the following statements and find out the incorrect statement. a. The number and length of stamens is variable in flowers of same species. b. A typical angiosperm anther is bilobed with each lobe having two theca. c. Often a longitudinal groove runs lengthwise separating the theca. d. The anther consists of four microsporangia located at the comers one in each lobe. e. The microsporangia develop further and become pollen sacs. They extend longitudinally all through the length of an anther and are packed with pollen grains.