Test Preparation on Sexual reproduction in flowering plants–I- Biology Test Series for NEET - 2020
Which one of the following is resistant to enzyme action
Sporopollenin is chemically
Which one of the following is surrounded by a callose wall
Male gametes in angiosperms are formed by the division of
(b) Generative cell divides into two male gametes, if it has not divided already.
Male gametophyte in angiosperms produces
(d) Male gametophyte in angiosperm is 3-celled containing 2 male gametes (sperms) and vegetative cell.
Exine of pollen grains is composed of
(c) Exine is made up of sporopollenin (derived from carotenoid).
In angiosperm, all 4 microspores of tetrad are covered by a layer which is formed by
(a) It is outer most covering of tetrad microspores in microsporangium.
Pollinia is found in which of the following plant family
(d) In Asclepiadaceae family all microspores of a sporangium form a single body called pollinium.
The pollen grain is
(c) Pollen grain is partially developed male gametophyte because the rest of the development is completed on stigma when pollen grains start to germinate and produces pollen tube having two male nuclei.