What is age distribution and age pyramid ?

What is energy pyramid?

What is age structure? Give its role:

What are the different kinds of population with regards to age distribution?

The ages of Jatin, Nitin, and Mohasin are 16, 24 and 36 years respectively. What is the ratio of Nitin's age to Mohasin's age?

What is pyramid of biomass?

What is the way to compute the age of a fossil?