Select the correct statements w.r.t. pollen grain
(a) Its sporoderm consists of exine and intine
(b) It has exine which helps in fossilization
(c) It is generally spherical with about 25-50 μm diameter
(d) It can be stored in liquid for years
(e) Its viability does not depend on temperature, and humidity.
In cells of endothecium, a-cellulosic fibrous bands arise from
Select the incorrect statement w.rt. tapetum
(a) Cells of tapetum are polyploid
(b) Amoeboid tapetum provides Ubisch bodies which helps in ornamentation of exine
(c) Tapetal cells show increase in their DNA content.
(d) Innermost layer of anther surrounds the sporogenous tissue.
(e) Glandular tapetum secretes sporopollenin, pollenkit and compatibility proteins
Out of the 4 whorls of flower, which of the following are sterile?
(a) androecium
(b) gynoecium
(c) calyx
(d) corolla
Which of the following layer helps in dehisence of anther due to its hygroscopic nature ?
Which layer in Arceuthobium has fibrous thickenings
Select the correct statement w.rt anther.
(a) Anther lobes are attached to each other by a band of vasculated sterile tissue
(b) Fibrous bands are present in Hydrochantaceae.
(c) Microsporangia on maturity get filled with pollen grains
(d) Homogeneous mass of meristematic cells in microsporangium form microspore mother cells.
(e) Cells of middle layers nourishes the developing pollen grains
Which of the following type of cytokinesis that takes place in PMCs after meiosis is considered as advanced type?
Select the incorrect statement
