Question

Pyramid of numbers in a forest ecosystem is
A. Upright
B. Inverted
C. Irregular
D. Linear

Answer 1

Hint: An ecological pyramid exhibits the relationship existing between the productivity, biomass, and the energy exhibited by the organisms at different trophic levels. Different ecosystems feature different pyramids.

Complete Answer:
Pyramid of numbers is helpful in representing the organism number across each trophic level.
A. The pyramid of numbers represents the individual organism count across different trophic levels. Within a forest ecosystem, the producers represent the large size trees which function as the pyramid base. The herbivores such as deer, fruit-eating birds, and elephants, etc form the primary consumers. These ranks lower than the primary producers. Followed by this, you have a decreasing number across each successive trophic level. Thus, a pyramid of numbers in a forest ecosystem is an upright one. Therefore, this is the correct option.

B. The pyramid of numbers is inverted in the case of parasitic food chain and forest ecosystems. Therefore, this is the incorrect option.

C. As the number of organisms at every level of the pyramid can vary, the pyramid of numbers can have an irregular shape. But in case of forest ecosystems, there is a regularity seen, therefore, this is the incorrect option.

D. Pyramid of numbers cannot be linear, therefore, this is the incorrect option.

Thus, the correct option is A) Upright.

Note: The importance of pyramid of numbers are,
- They can be used to determine how the population of particular species can affect another.
- It can serve as the basis for quantitative analysis of an ecosystem.