The unequally thickened wall of fern sporangium that helps in dehescence is

The thickening of walls of arteries is called

The thickening of walls of arteries is called

The thickening of walls of arteries is called

The thickening of walls of arteries is called

The tissue not having specifically thickened walls are

The number of spores in the sporangium of fern is

The number of spores in the sporangium of fern is

Supply scientific term for the following (a) The male sex organ within which male gametes are formed in algae, fungi, bryophytes and petridophytes (b) Leaf of fern (c) A sporangium that produces microspores

ANF produced by the walls of atria helps is

Highly thickened wall and very narrow lumen are characteristic features of