Question

Some plants flower only once in their life, generally after 50 – 100 years, they produce a large number of fruits and die
A) Strobilanthes kunthiana
B) Bamboo
C) Callistemon linearis
D) Cymbopogon reptocus

Answer 1

Hint: It is the only plant that blooms once in its lifetime, normally after 50 to 100 years. A huge number of fruits are produced and they die. To reproduce themselves, they rely on the seed. In soil protection, it also has a great function.

Complete answer:
In the subfamily Bambusoideae of the grass family Poaceae, bamboos are evergreen perennial flowering plants.
The root of the word "bamboo" is unknown, but it probably derives from the language of Dutch or Portuguese, which initially borrowed it from Malay or Kannada.
The internodal regions of the stem are normally hollow in bamboo, as in other grasses, and the vascular bundles in the cross-section are spread around the stem instead of in a cylindrical arrangement.
Often absent is the dicotyledonous woody xylem. The lack of secondary growth wood allows monocots' stems to be columnar rather than tapering, like the palms and large bamboos.
A rare occurrence is bamboo flowering. Before flowering, seeding and dying, the bamboo grows vegetatively for a species-specific period. In their life cycle, most bamboo plants bloom only once. Any bamboo species only blooms once every 40 to 50 years.

Hence, the correct answer is an option (B) 'Bamboo'.

Additional information:
Bamboos (Bambusoidaea) are made up of 1439 separate species in 116 genera. It is one of the 12 grass family subfamilies (Poaceae) and the only one in the forest to be diversified. Bamboo is a perfect plant for those who are involved in a green environment.
The fastest-growing plant on this planet is bamboo. It was reported rising in a 24-hour cycle at an incredible 47.6 inches.
In the equilibrium of oxygen and carbon dioxide in the atmosphere, bamboo is a key factor. A bamboo grove releases 35 percent more oxygen than an equal treetop stand. Because of this, a perfect way to reduce carbon emissions and help combat global warming is to grow bamboo.
A viable substitute for wood is bamboo. For most softwoods, harvesting can be achieved in 3-5 years vs 10-20. In biomass production, it can yield 6 to 1 pine. With a tensile strength of 28,000 psi, it is also one of the best construction materials. Mild steel weighs 23,000 psi to help give you an understanding of how much this is.
It is a perfect instrument for soil conservation. With a total of 25 percent stem flow rate and canopy intercept, it significantly decreases erosion. It dramatically lowers the run-off of rain, avoids major soil erosion and makes it very pleasant to the environment.
Bamboo can be eaten (new shoots), turned into clothing fibre, could be used in concrete reinforcement, can provide great feed for livestock with up to 22 percent protein in the vegetation, can be machined into various types of wood, etc. Compiling a list of what bamboo should not be used for could be better than what it is used for.
Bamboo can also tolerate extreme conditions that most plants cannot. It was actually the first plant to re-green after the atomic blast in Hiroshima in 1945.

Note:
For the state of Mizoram, a bamboo policy, the first of its kind in the country, is being formulated. This would be a working plan to tackle problems like harvesting bamboo. The union government has also advised the state administration to raise food stocks and store these provisions in silos that are rodent-proof.