Differentitae between spermatogensis and oogenesis on the basis of:
Nature of meiotic divison undergone by gamete mother cells.

Differentitae between spermatogensis and oogenesis on the basis of: Site of completion of the process.

Differentitae between spermatogensis and oogenesis on the basis of: Time of initiation of the process.

What are the two types of cells on the basis of nature of nucleus ?

Differentiate between parenchyma, collenchyma and scelerenchyma on the basis of their cell walls.

Differentiate between monera and protista based upon the following characters: Chemical nature of cell wall

With the reference to the following figure of stages of a microspore maturing into a pollen grain, answer the question. How many meiotic divisons occurs in the formation of two male gametes ?

Arrange the following terms in the correct developmental sequences:Pollen grain, sporogenous tissu, microspore tetrad, pollen mother cell. Male gametes.

Short Answer Questions Three mark Each (a) The diagram given below shows the transverse section of a young anther. Identify the parts a, b, c and d. (b) The developmental stages of male gametes in plants consist of microsporogenesis and male gametophyte. Arrange the following terms in their correct developmental sequence. Pollen grain Sporogenous tissue Anther Microspore tetrad Pollen mother cell Male gamete.