Label the three tiers 1. 2. and 3 in the above age pyramid.

What type of population growth is represented by the above age pyramid.

Label 1 and 2 in the given figure.

Fully label the above diagram.

Construct a pyramid of biomass starting with phytoplankton. Label its three trophic levels. Is the pyramid upright or inverted? Justify your answer.

Study the three representatives figures of age pyramid relating two human population given below and answer the following questions. Mention the names given to the 3 kinds of age profiles (i),(ii) and (iii).

Fully label the given above diagram.

Study the three representatives figures of age pyramid relating two human population given below and answer the following questions. Which one of them is ideal for population and why?

Study the three representatives figures of age pyramid relating two human population given below and answer the following questions. How do search age profile studies help policy makers get concerned about our population and prepare for future planning?

The present age of Sahil’s mother is three times the present age of Sahil. After 5 years their ages will add to 66 years. Find their present ages.

Solve it graphically : The age of Sanjay is 4 times the age of his son. 5 years hence the age of Sanjay will be three times the age of his son. Find their present ages.