NEET BIOLOGY PYQ 20 MCQS TEST WITH ANSWERS 27 JULY

Ecology MCQ Quiz

Q1. Eltonian pyramids of numbers are upright in one of the following ecosystem -
Grassland
Tree
Pond
Both (1) and (3)

Q2. The type of food chain in which organic matter decomposed is converted into energy rich compounds is called -
Detritus food chain
Grazing food chain
Cybernetics
None above

Q3. One of Eltonian pyramids have to be upright always -
Biomass
Energy
Number
All of these

Q4. Word 'ecosystem' was coined by -
Elton
Tansley
Odum
Billing

Q5. Biotic components include -
producers only
consumers only
producers and consumers only
producers, consumers and decomposers

Q6. The last organisms of the food chain are generally-
photosynthetic plants
herbivores
carnivores
top carnivores

Q7. In an ecosystem, the population of -
primary producers is larger than primary consumers
secondary consumers is largest
primary consumers out numbers primary producers
primary consumers are least dependent upon primary producers

Q8. An aquatic ecosystem consists of -
biotic factors
biotic and abiotic factors
consumers only
producers only

Q9. The best arrangement of an energy system consisting of hawks, snakes, mice and grasses is -
Grass → mice → snake → hawks
Grass → snake → mice → hawks
Grass → mice → hawks → snakes
Mice → snake → hawks → grass

Q10. If a big fish eats small fish which eats Hydra who in turn eats water fleas; water fleas eat phytoplankton. Water fleas will be -
Producers
Primary consumers
Secondary consumers
Top consumer

Q11. Which pyramid is always upright?
Pyramid of number
Pyramid of biomass
Pyramid of energy
Both (1) and (3)

Q12. Which constitutes the structure of an ecosystem?
Ecological community
Quantity and distribution of abiotic materials
Range of physical conditions
All the above

Q13. Biotic component of an ecosystem consists of -
Producers
Consumers
Decomposers
All the above

Q14. Autotrophic organisms are called -
Producers
Consumers
Decomposers
None

Q15. In a freshwater pond, number of primary consumers is -
Less than Top consumers
Less than secondary consumers
Less than producers
Less than tertiary consumers

Q16. Food chain refers to -
Humans forming a chain
Transfer of food energy from producers to consumers
Animals near food
None

Q17. Sequence of species through which organic molecules pass is called -
Food web
Food chain
Nutrient cycle
Pyramid of energy

Q18. A group of interconnected food chains is called -
Pyramid of energy
Food web
Food cycle
Complex food chain

Q19. The energy utilized by the living world is primarily -
Heat
Electricity
Light
Kinetic

Q20. Energy flow in ecosystem is -
Unidirectional
Bidirectional
Multidirectional
None