Which one of the most common embryo sac in flowering plant?
(1) Monosporic, 8 nucleated and 7 celled
(2) Monosporic, 7 celled and 7 nucleated
(3) Bisporic, 8 nucleated and 7 celled
(4) Bisporic, 7 celled and 8 nucleated
The normal type of embryo sac is 8-nucleated and
(1) 8-celled
(2) 7-celled
(3) 6-celled
(4) 5-celled
Embryo sac is
(1) megaspore
(2) microgametophyte
(3) female gametophyte
(4) megasporangium
In some seeds, reminants of nucellus are also presistent. This residual, persistent nucellus is the
(1) pericarp
(2) perisperm
(3) chalazosperm
(4) mesosperm
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
All of the following statements are correct except:
1. | The proximal end of the filament is attached to the thalamus or the petal of the flower. |
2. | The anther is a four-sided structure consisting of four microsporangia, two in each lobe.
|
3. | The number and length of stamens are variable in flowers of different species.
|
4. | In a longitudinal section, a typical microsporangium appears near circular in outline. |
Which among the following statement is incorrect with respect to tapetum?
(1) It nourishes developing pollen grains.
(2) It has dense cytoplasm.
(3) It is the innermost wall layer of microsporangia.
(4) Cells have single nucleus only.
Match the following:
1 | Sporogenous tissue | I | Process of formation of microspores from PMC by meiosis |
2 | Microspore tetrad | II | Microspores arranged in cluster of four cells |
3 | Microsporogenesis | III | Formation of microspore tetrad by meiosis |
4 | Tapetum | IV | Nourishes pollen grains |
(1) 1-III ; 2-I ; 3-II ; 4-IV
(2) 1-III ; 2-II ; 3-I ; 4-IV
(3) 1-II ; 2-III ; 3-I ; 4-IV
(4) 1-II ; 2-III ; 3-IV ; 4-I