The producers in aquatic ecosystems include all except:

1.	cyanobacteria	2.	algae
3.	plants	4.	zooplankton

Which of the following is most likely to exhibit the maximum difference between GPP and NPP?
1. phytoplankton in the ocean.
2. corn plants in a farmerʹs field.
3. prairie grasses.
4. an oak tree in a forest.

Primary producers near deep-sea vents are:
1. Chemohetrotrophic prokaryotes
2. Chemoauotrophic prokaryotes
3. Photosynthetic prokaryotes
4. Photosynthetic autotrophs

Decomposers like fungi and bacteria are :

Choose the correct answer :

An inverted pyramid of biomass can be found in which ecosystem?

Which of the following is not a producer?

Which of the following ecosystems is most productive in terms of net primary production? 

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis? 

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores? 

Among the following bio-geo-chemical cycles, which one does not have losses due to respiration? 
1. Phosphorus
2. Nitrogen
3. Sulphur
4. All of the above