Draw the diagram of a mature embryo sac and show its 8 nucleate 7-celled stage. Show the following parts:
antipodals, synergids, egg, central cell, polar nuclei.

Draw a diagram of a mature embrryo sac of angiosperm, label its any six parts.

Draw a diagram of fertilized embryo sac showing zygote and PEN.

SHORT ANSWER TYPE QUESTIONS In the below given figure, label the following parts: male gametes, egg cell, polar nuclei synergid and pollen tube.

Long Answer Questions Five mark Each QUESTIONS FROM CBSE BOARD EXAMINATIONS : (a) Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it: (i) that develops into seed coat. (ii) that develops into an embryo after fertilization. (iii) that develops into an endosperm in an albuminous seed. (iv) through which the pollen tube gains entry into the embryo sac. (v) that attaches the ovule to the placenta (b) Describe the characteristic features of wind pollinated flowers.

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.

Draw diagram to show the sequence of changes occurring in a cell during meiosis II.

In the following diagram showing the structure of embryo of a dicot seed, what are the parts marked I,II and III sequentially?

With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Long Answer Questions Draw a well-labelled diagram of a mature ovule, showing its internal structure.

With a neat diagram, explain the 7-celled, 8-nucleate mature female gametophyte.