Glumes are modified

Select the correct option regarding the gynoecium:

Corolla with four diagonally arranged petals is

The arrangement of ovules within the ovary is known as placentation. What does the term placenta refer to? Describe the various types of placentation found in flowers.

Suggest a possible explanation why the seeds in a pea pod are arranged in a row,whereas those in tomato are scattered in the juicy pulp.

Papilionaceous flower with large vexillum covering two wings and the wings covering the keel has corolla aestivation of