An inverted pyramid of number and an inverted pyramid of biomass are respectively seen inA. Grassland ecosystemB. Sea and tree ecosystemC. Tree and sea ecosystemD. Sea and grass ecosystemE. Tree and grassland ecosystem

The structure of the question seems a bit confusing, but I'll do my best to provide an explanation.

An inverted pyramid of numbers and an inverted pyramid of biomass are ecological concepts used to describe the relationship between different trophic levels within an ecosystem. Inverted pyramids are uncommon and are usually observed in certain ecosystems with specific characteristics.

Inverted Pyramid of Numbers: This occurs when the number of individuals at a higher trophic level (such as predators or carnivores) is fewer than the number of individuals at a lower trophic level (such as herbivores or primary consumers). Inverted pyramids of numbers are often seen in cases where a few large predators are supported by a larger number of smaller prey organisms. This is relatively rare and can be observed in some aquatic ecosystems or parasitic relationships.

Inverted Pyramid of Biomass: This occurs when the biomass (total mass of organisms) at a higher trophic level is less than the biomass at a lower trophic level. In other words, the organisms at the top of the food chain collectively have less mass than the organisms they consume. This can happen when the lower trophic level organisms are rapidly reproducing and have a short lifespan, leading to a higher biomass despite individual organisms having smaller sizes.

Based on the given options, it's not immediately clear which ecosystem is associated with which type of inverted pyramid. However, if we interpret the options in the context of the question, we can make an educated guess:

B. Sea and tree ecosystem: Inverted pyramid of biomass is often associated with marine ecosystems due to the high rate of primary production in the ocean (phytoplankton), which supports a large biomass of smaller organisms. Trees are not usually associated with inverted pyramids.

D. Sea and grass ecosystem: Inverted pyramid of numbers might be associated with a grassland ecosystem where a few large predators (carnivores) feed on a larger number of herbivores. However, inverted pyramid of biomass is more likely to be seen in marine ecosystems.

E. Tree and grassland ecosystem: Trees are not typically associated with inverted pyramids. Grassland ecosystems could potentially have an inverted pyramid of numbers due to predator-prey relationships.

Without more specific information about the context and characteristics of each ecosystem, it's challenging to definitively determine which ecosystems are associated with inverted pyramids of numbers or biomass.