(A) : Pollens are produced in microsporangia after meiotic divison.
(R) : They are discharged at 4-called stage representing male gametophyte.

Read the following text and answer the following questions on the basis of the same: A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings. Assertion (A) : The innermost layer of microsporangium is called tapetum. Reason (R) : Tapetum nourishes the develop into pollen grains.

Read the following text and answer the following questions on the basis of the same: A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings. The prominent pollen grain aperture called germ pore is present in

Read the following text and answer the following questions on the basis of the same: A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings. Study of pollen grains is called ...........

Pollen dispersal occurs at two/three celled stage, further development of male gametophyte takes place

Pollen dispersal occurs at two/three celled stage, further development of male gametophyte takes place

Read the following text and answer the following questions on the basis of the same: A typical anther is bilobed. It is a tetragonal structure consisting of four microsporangia. These microsporangia form pollen sac which on maturity gets filled with a pollen grains. Pollen grains represent the male gametophytes, their cell wall is very hard. Pollen grains of many species cause severe allergies which cause various diseases in human beings. Select the odd one out with respect to wall layers of microsporangium in flowering plants.

Sometimes more than 4 pollen grains are produced from one microspore mother cell, it is called

Sometimes more than 4 pollen grains are produced from one microspore mother cell, it is called

Which of the following statement/s regarding gametogensis is/ are wrong ? I. Gametogensis refers to the process of formation of the two types of gametes. II. Gametogenesis occurrs is gonads. III. In a majority of sexually reproducing organisms the gameter produced are of morphologically in simialr types (isogametes). IV. Gametogenesis involves the meictioc divison . V. The male gamtes is called the antheroid or sperm and the female gamete is called the egg or ovum.

How many meiotic divisons will be needed to produce 44 female gametophytes in angiosperms?