Which one of the following statement is correct?
(1) Hard outer layer of pollen is called intine
(2) Sporogenous tissue is haploid
(3) Endothecium produces the microspores
(4) Tapetum nourishes the developing pollen
Which one of the following is surrounded by a callose wall?
(1) Microspore mother cell
(2) Male gemete
(3) Egg
(4) Pollen grain
In angiosperms, microsporogenesis and megasporogenesis
(1) occur in anther
(2) form gametes without further divisions
(3) involve meiosis
(4) occur in ovule
Which of these is a diploid structure ?
(1) Pollen grains
(2) Egg
(3) Megaspore
(4) MMC
The following is the diagram of T.S. of anther. Identify the parts labelled A, B and C.
1. | A - Connective tissue, B - Pollen grains, C - Endothecium |
2. | A - Endothecium, B -Connective tissue, C - Pollen grains |
3. | A - Pollen grains, B - Connective tissue, C - Endothecium |
4. | A - Endothecium, B - Pollen grains, C - Connective tissue |
If a stock has 2n = 48 and scion microspore mother cell has 2n = 24; then root cell and the microspores will have .... chromosomes respectively.
(1) 12, 48
(2) 48, 12
(3) 24, 12
(4) 24, 96
A fertilized egg of a plant has 40 chromosomes. The number of chromosomes present in the microspore mother cell is
(1) 20
(2) 40
(3) 60
(4) 80
What is the number of microsporangia in each lobe of an angiosperm anther?
(1) Four
(2) Two
(3) Eight
(4) One
Which among the following extend longitudinally to become pollen sac?
(1) Microsporangia
(2) Filament of anther
(3) Tapetum
(4) Endothecium
Which among the following is not a wall layer of microsporangium?
(1) Endothecium
(2) Nucellus
(3) Tapetum
(4) Middle layers