Circinotropous: The funicle is large and coiled around the ovule eg. Opuntia. Amphitropous: Both body of ovule and embryo sac are curved. The embryo sac assumes horse-shoe shape. e.g. Papaveraceae.

Correct Option: A

Circinotropous: The funicle is large and coiled around the ovule eg. Opuntia. Amphitropous: Both body of ovule and embryo sac are curved. The embryo sac assumes horse-shoe shape. e.g. Papaveraceae.

After entering the ovule, the pollen tube is attracted towards the micropylar end of the embryosac. The attractants are secreted by synergids or help cells. The pollen tube pierces one of the two synergids and bursts it. The synergid is simultaneously destroyed.

Correct Option: C

After entering the ovule, the pollen tube is attracted towards the micropylar end of the embryosac. The attractants are secreted by synergids or help cells. The pollen tube pierces one of the two synergids and bursts it. The synergid is simultaneously destroyed.

Aleurone layer is the layer formed by the endospermic tissue in the members of family Graminae eg. wheat, rice, maize etc. Obviously it will be a triploid tissue. So if synergids have 8 no. of chromosomes which are haploid than aleurone- layer must have 24 chromosomes.

Correct Option: A

Aleurone layer is the layer formed by the endospermic tissue in the members of family Graminae eg. wheat, rice, maize etc. Obviously it will be a triploid tissue. So if synergids have 8 no. of chromosomes which are haploid than aleurone- layer must have 24 chromosomes.

In a dicot plant general arrangement of nuclei in the embryosac is that 3 nuclei in 3 cells of egg apparatus (one egg cell & 2 synergids) at micropylar end and 2 polar nuclei in almost middle region and 3 nuclei in the form of antipodals at the distal end from micropyle, towards nucellus. So total nuclei 3 + 2 + 3.

Correct Option: A

In a dicot plant general arrangement of nuclei in the embryosac is that 3 nuclei in 3 cells of egg apparatus (one egg cell & 2 synergids) at micropylar end and 2 polar nuclei in almost middle region and 3 nuclei in the form of antipodals at the distal end from micropyle, towards nucellus. So total nuclei 3 + 2 + 3.

Egg nucleus and secondary nucleus has haploid number of chromosomes. While all other plant structures have diploid number of chromosomes.

Correct Option: D

Egg nucleus and secondary nucleus has haploid number of chromosomes. While all other plant structures have diploid number of chromosomes.