Raja a science student observed the structure of mature embryo sac comprising antipodals, central cells and egg apparatus. Explain each one of them.

Ina mature embryo sac the central cell is

Name the component cells of the 'egg-apparatus' in an embryo sac.

A vector is engineered with three features which facilitate its cloning within the host cell. List the three features and explain each one of them.

Select the correct statements (s) regarding the structure of a mature embryo sac. (i) Egg apparatus is situated towards chalzal end. (ii) Antipodal cells are situated towards micropylar end. (iii) A typical angiospermic embryo sac is 7-celled, 8-nucleate at maturity

A mature, embryo-sac in a flowering plant may possess 7-cells, but 8-nuclei. Explain with the help of a diagram only.

How many following cells are present in an embryo sac:- A- Egg cell B- Synergids C-Antipodals D-Central cells

Embryo development other than the egg cell of haploid embryo sac from synergid and antipodals is known as

Draw a longitudinal section of a post-pollinated pistil showing entry of pollen tube into a mature embryo-sac. Label filiform apparatus, chalazal end, hilum, antipodals male gametes and secondary nucleus .