Microsporocytes or microspore mother cell after meiosis give rise to microspore. No any other cell (in given options) divide by meiosis.

Correct Option: D

Microsporocytes or microspore mother cell after meiosis give rise to microspore. No any other cell (in given options) divide by meiosis.

200 seeds of pea would be produced from 200 pollen grains and 200 embryo sac. 200 pollen grains will be formed by 50 microspore mother cell while 200 embryo sac will be formed by 200 megaspore mother cell (because 3 will degenerate) so 250/500.

Correct Option: D

200 seeds of pea would be produced from 200 pollen grains and 200 embryo sac. 200 pollen grains will be formed by 50 microspore mother cell while 200 embryo sac will be formed by 200 megaspore mother cell (because 3 will degenerate) so 250/500.

It is a Polygonum type ovule in which the body of ovule is straight i.e. funiculus, chalaza, embryo sac & micropyle lie in the same vertical axis.

Correct Option: A

It is a Polygonum type ovule in which the body of ovule is straight i.e. funiculus, chalaza, embryo sac & micropyle lie in the same vertical axis.

Each pollen has two layered wall. The outer layer is thick, tough, cuticularised called exine which is composed of a material called "sporopollenin". It is highly resistant to biological and physical decomposition, due to which pollens are preserved for a long time in fossils.

Correct Option: D

Each pollen has two layered wall. The outer layer is thick, tough, cuticularised called exine which is composed of a material called "sporopollenin". It is highly resistant to biological and physical decomposition, due to which pollens are preserved for a long time in fossils.

In angiosperms the male gametes are carried by the pollen tube was discovered by Strasburger in 1884. The process is called Siphonogamy.

Correct Option: B

In angiosperms the male gametes are carried by the pollen tube was discovered by Strasburger in 1884. The process is called Siphonogamy.