Which of the following is / are not a natural ecosystem?

(a)

Forest ecosystem

(b)

Rice field

(c)

Grassland ecosystem

(d)

Desert ecosystem

Solar energy used by green plants for photosynthesis is only ______.

(a)

2 – 8%

(b)

2 – 10%

(c)

3 – 10%

(d)

2 – 9%

Ecosystem consists of ____.

(a)

decomposers

(b)

producers

(c)

consumers

(d)

all of the above

Significance of food web is / are ______.

(a)

it does not maintain stability in nature

(b)

it shows patterns of energy transfer

(c)

it explains species interaction

(d)

b and c

Identify the incorrect option among the following component sequence.

(a)

air, water, sunlight and temperature

(b)

latitude, altitude, direction of mountain and aptitude

(c)

soil air, pH of soil, saltwater and soil moisture

(d)

carbohydrate, protein, lipids and humic substances

Which is not a macro consumer?

(a)

Herbivore

(b)

Carnivore

(c)

Omnivore

(d)

Decomposer

Identify the incorrect statement

(a)

Carbon stored in oil is referred as Grey carbon

(b)

Carbon stored in atmosphere is referred as Blue carbon

(c)

Carbon stored in industrialized forests is referred as Green carbon

(d)

Carbon emitted from gas, died engine is referred as Black carbon

Which of the following food chain is in improper sequence?

(a)

Plants ~ snake ~ rabbit ~ lizard ~ eagle

(b)

Plants ~ grasshopper ~ lizard ~ snake ~ hawk

(c)

Plants ~ lizard ~ rabbit ~ snake ~ eagle

(d)

Plants ~ rabbit ~ lizard ~ hawk ~ eagle

The upright pyramid is not a feature of _______

(a)

Pond ecosystem

(b)

Grassland ecosystem

(c)

Forest ecosystem

(d)

Terminal ecosystem

Which of the following is abundant in rock deposits and guano?

(a)

Nitrogen

(b)

Phosphorous

(c)

Oxygen

(d)

Calcium