Question

Get a brief explanation on the topic pollen grains, germination,tube formation ..​

Answer 1

Answer:

POLLEN GRAINS

Pollen is a powdery substance consisting of pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells). ... Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination.

GERMINATION

Germination is usually the growth of a plant contained within a seed; it results in the formation of the seedling. ... Under proper conditions, the seed begins to germinate and the embryo resumes growth, developing into a seedling.

TUBE FORMATION

There are two major ways of forming a neural tube. In primary neurulation, the cells surrounding the neural plate direct the neural plate cells to proliferate, invaginate, and pinch off from the surface to form a hollow tube.

Explanation:

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