Most of the producers in an aquatic ecosystem are …………….. 

The primary food producers are plants

The primary food producers on the Earth are Plants

Answer is (B) 9th

A) 1 – b, 2 – e, 3 – d, 4 – c, 5 – a

B) to improve performance of producers.

Answer is (C) lesser

C) Oscillatoria, Ulothrix

D) all the given

Answer is (B) River

(a) Reduction in primary productivity. No biomass available for consumption by higher trophic levels/heterotrophs (b) Increase in primary productivity and biomass of producers. Carnivores population will subsequently dwindle due to food...