Ecosystem

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Ecosystem - 03

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Mrs. Surabhi Mukherjee, (M.Sc., Biotechnology, B.Ed., gurucoolclasseslko@gmail.com)

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Q1. Which one of the following is not a functional unit of an ecosystem? *

1 point

Energy Flow

Satisfaction

Productivity

Producers

Q2. Which is not the characteristic of a population? *

1 point

Stratification

Natality

Mortality

Sex ratio

Q3. Lincoln index measures *

1 point

Population mortality rate

Population density

Population natality rate

Population size

Q4. Allelopathy refers to *

1 point

Inhibition of sporulation of pathogen by the host

Inhibition of growth of one species by another by preventing reproduction

Inhibition of growth of one species by another by the production of toxins

Altering the reproductive cycle of one organism by another

Q5. The ratio between energy flow at different points in a food chain is known as *

1 point

Ecological efficiency

Ecological assimilation

Ecological capacity

Ecological potential

Q6. The ability of a population to increase under ideal environmental conditions is called *

1 point

Carrying capacity

Absolute natality

Natality

Biotic potential

Q7. In an ecosystem, the energy flow is always *

1 point

Always bidirectional

Always down directional

In any direction

Always unidirectional

Q8. In thermal stratification, the middle region which shows vertical temperature change is called *

1 point

Hypolimnion

Mesolimnion

Metalimnion

Epilimnion

Q9. Select a non-denitrifying bacteria *

1 point

Bacillus ramosus

Thiobacillus

Pseudomonas aeruginosa

Thiobacillus denitrificans

Q10. Which one is a ‘K’ selected species? *

1 point

Human

Grass

Taraxacum

Aspergillus

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