A. First link of the food chain and are known as primary producers
B. Second link of the food chain and are herbivorous
C. Third link of the food chain and are tertiary consumers
D. The end of the food chain and are decomposers
Related Mcqs:
- The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:
A. Nitromonas
B. Pseudomonas
C. Nostoc
D. Rhizobium - In an ecosystem, bacteria are considered as:
A. Microconsumers
B. Secondary consumers
C. Primary consumers
D. None of these - The main role of bacteria in the carbon cycle involves:
A. Photosynthesis
B. Assimilation of nitrogenous compounds
C. Chemosynthesis
D. Digestion or breakdown of organic compounds - Bacteria and fungi in a forest ecosystem are generally:
A. Producers
B. Decomposers
C. Primary consumers
D. Secondary consumers
E. Tertiary consumers - In which type of the forest, humus is formed by the dry and dead leaves:
A. Coniferous forest
B. Alpine
C. Tundra forest
D. Deciduous forest - Dead and Moribund trees (m) include:
A. Bent over
B. Badly leaning trees usually of the whip type
C. Both (a) & (b)
D. None of these - In an aquatic environment, microscopic animals and plants are collectively known:
A. Commensals
B. Herbivores
C. Fauna and flora
D. Planktons - In desert grasslands, which type of animals are relatively more abundant?
A. Diurnal
B. Arboreal
C. Aquatic
D. Fossorial - The association of nodule bacteria with leguminous roots is known as:
A. Saprophytism
B. Symbiosis
C. Epiphytism
D. Parasitism - Nitrification takes place only in well aerated soils because the bacteria responsible for it are:
A. Aerobic
B. Anaerobic
C. Parasites
D. None of these
