Long question 7 marks. Describe the process, development of Male gametophyte in flowering plants ?

Androecium:

Androecium is the third whorl, which is the male reproductive part of the flower.

Unit:

Its units are called stamen.

Stamen:

Each stamen has a thread like filament at the free end of which anther is attached.

Anther:

Anther has pollen sacs in which haploid microspores (pollen grains) are produced through meiosis.

Process:

Each microspore germinates into the male gametophyte generation. During it, the nucleus of microspore undergoes mitosis ans produces two nuclei i.e. a tube nucleus and a generative nucleus. The generative nucleus again undergoes mitosis and produces two sperms. So, a germinated microspore has a tube nucleus and two sperms. All these structures are the male gametophyte generation of the plant.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.