Question

In the flowering plant, the largest number of haploid cells occur in
A. Ovule
B. Microsporangia
C. Root tip
D. Cambium

Answer 1

Microsporangia is also called pollen sac. Haploid cells are cells with a single set of chromosomes. Diploid cells have two sets of the chromosome.

Complete answer:
Angiosperms are also known as flowering plants. They have an ovule (Egg) present in the female gametophyte (ovary) which fertilizes to form a seed.
Ovule- The structure that produces female reproductive cells in angiosperms is called an ovule. It is Made up of three parts namely, integuments, nucellus, and female gametophyte. The female gametophyte is termed as a megagametophyte. Megagametophyte produces egg i.e. megaspore which is the haploid cell. Thus, the ovule has a single haploid cell.
Microsporangia- Microsporangia is also called a pollen sac. Producing microspores pollen gives rise to a male gametophyte. It produces several pollen grains. Pollen is the haploid male gamete. So, the structure with many haploid cells that produce male gametophyte in angiosperms is the Microsporangia.
Root tip- The root tip is also called a root cap sometimes referred to as Calyptra. It is a meristematic tissue which is diploid.
Cambium- undifferentiated mass of cell present between xylem and phloem. Responsible for the plant’s growth. Secondary growth occurs because of cambium. It is diploid tissue.

So, the correct answer to the given question is option B. Microsporangia

Note: Stamen is the pollen-producing organ of the flower. Stamen is made up of bilobed anther, stalk, and filament. Anther also called pollen sac has powdery pollen. Stamens collectively form androecium.