Scientists use different types of models to analyze the structure of ecosystems. which characteristic is seen in a biomass pyramid

In biomass pyramid living matter is present at all the trophic level in the ecosystem.

Explanation:

There are three ecological pyramids that are the pyramid of biomass, the pyramid of energy, and the pyramid of numbers.

Pyramids of biomass represent the total living matter present at each of the trophic levels in the ecosystem. It shows how much biomass of lower trophic levels is required to support the biomass of successive trophic levels.

The pyramid of biomass can be straight or inverted. In straight pyramid, larger biomass of lower trophic level supports smaller biomass of upper trophic level and vice-versa occurs with an inverted biomass pyramid. The pyramid of the number shows the number of the organism at each trophic level.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.