The mature anther wall comprises an epidermis followed by a layer of radially elongated cells with fibrous bands of callose called endothelium whose function is

Commonly in a mature fertilized ovule n, 2n and 3n condition is respectively found in

Which of the following is necessary for seed formation in angiosperm?

Palynology deals with study of

Tapetum is present between

The axillary buds arise

Angiosperm differ from the gymnosperms

Parallel venation are found in

Thick and woody climbers are called as

Leaf less stem of onion which is produce to bear flowers is called