Question

Dicot pollen grains are commonly
A) Monocolpate
B) Bicolpate
C) Tricolpate
D) Multi Colpate

Answer 1

Hint: The pollen structure for monocot plant and dicot plant is different. In monocot the pollen formed by the flowers has pore in the outer layer while in dicot, the pollen formed has three pore in the outer layer.

Complete Answer:
- The pollen grains are the reproductive part of the plants that are found in the anther. They are produced in the microsporogenesis process. From each diploid sporogenous cell four microspores are produced during meiotic division.
- Once the four microspores get formed the wall of the pollen grains starts developing that contains callose wall. The pollen grains have three different parts; the center consists of the cytoplasmic part that is the source of nuclei involved in the fertilization process.
- The cytoplasm is surrounded by the plasma membrane, the pollen grains composed of vegetative cells as well as generative cells when matured.
- The vegetative cells are larger in size and have large amounts of food in stored form while the generative cells are smaller and float in the cytoplasm of the vegetative cell.
- Inside the pollen gain, it has one generative nucleus and one tube nucleus; the generative nucleuses when get divided two male gametes are formed and develop the pollen tube after pollination.
- Now, colpus is a long furrow gap and is named as colpate pollen grains. In angiosperms, there are generally two types of colpate; monocolpate and tricolpate pollen grains. The monocolpate pollen grains are present in monocots while dicots contain tricolpate pollen grains that have three surface furrows.

Hence, the correct answer is ‘C’ Tricolpate.

Note: In some plants the pollen grains contain sharp teeth like projection that involve in the adhering process of pollen grains to the surface of stigma or else it may get dispersed into the ground rather than the pollen tube.