NEET PYQ 20 MCQS TEST QUIZ 27 JULY

Ecology MCQ Test (Q31-Q50)

Q31. One of the following is sedimentary cycle ?

Carbon
Hydrogen
Nitrogen
Phosphorus

Q32. The primary consumers in a pond ecosystem is -

Phytoplankton
Zooplankton
Fishes
Bacteria

Q33. The number of primary producers within a specified area would be minimum in -

Grassland
Pond ecosystem
Desert
Forest ecosystem

Q34. The river mouth ecosystem is called as -

Estuarine
Lotic
Lentic
None of these

Q35. In a natural ecosystem, decomposers include-

Bacteria and fungi
Parasitic algae
Macroscopic animals
All the above

Q36. Which of the following is not true for man made ecosystems?

They are highly efficient
They lack the diversity of natural ecosystems
They mainly comprise seasonal vegetation or one chosen crop.
Parks and aquaria are not man-made ecosystems.

Q37. Lotic ecosystem refers to -

Ecosystem of estuary water
Deep marine-water ecosystem
Ecosystem of flowing water
Static-water ecosystem

Q38. The ecosystem of a pond is referred to as -

Lentic
Lotic
Xeric
Benthic

Q39. The correct sequence of energy flow is -

Sun→autotrophs→heterotrophs→environment→space
Space→environment→heterotrophs→autotrophs→sun
Sun→space→environment→heterotrophs→autotrophs
Sun→space→environment→autotrophs→heterotrophs

Q40. The major reservoir of phosphorus cycle is-

Ocean
Rocks
Atmosphere
Pollution

Q41. Efficiency of any ecosystem is best depicted by pyramid of -

Energy
Number
Biomass
Volume

Q42. The correct match is -

Producers act on decomposed substances
Consumers are autotrophs
Decomposers break dead organisms into simpler compounds
None of these

Q43. The first trophic level is always green plants because -

Wide distribution
Fix CO2 in presence/absence of sunlight
Richness in chlorophyll
Convert light energy to chemical energy

Q44. The creating force of any ecosystem is -

Organic fuels
Biomass
Solar energy
Producers

Q45. When frog eats grasshopper, the frog is -

Primary producer
Herbivore
Primary carnivore
Top consumer

Q46. The largest ecosystem in the world is -

Forests
Rivers
Oceans
Grasslands

Q47. If primary producers are absent -

Herbivores will not survive
Carnivores will not survive
Both will be disintegrated
No change

Q48. Grasshopper in grassland is a -

Producer
Herbivore
Carnivore
None

Q49. The pyramid of number for forest ecosystem is -

Upright
Inverted
Both
None

Q50. They can be put in the category of primary consumers -

Eagles and tigers
Fishes and whales
Snakes and frogs
Insects and cattle