The microspore tetrad of an angiosperm,at the time of formation,is surrounded by a callose wall. The breakdown of this wall is brought about by the enzyme callase,which is synthesized by the:

Identify the structure given below.

In flowering plants,meiosis occurs at the time of:

Consider the following statements and choose the correct answer from the given options.
$Statement \ 1$: Innermost layer of microsporangium is tapetum.
$Statement \ 2$: Cells of tapetum possess dense cytoplasm, more than one nucleus, and nourish the developing pollen grains.

Which part of the reproductive structure produces both enzymes and hormones?

If the developing microspore mother cells draw nourishment by contacting the tapetal cells,the type of tapetum is called