Which of the following ecosystem has the highest primary productivity?

(a)

Pond ecosystem

(b)

Lake ecosystem

(c)

Grassland ecosystem

(d)

Forest ecosystem

Ecosystem consists of ____.

(a)

decomposers

(b)

producers

(c)

consumers

(d)

all of the above

Which one is in descending order of a food chain?

(a)

Producers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Tertiary consumers

(b)

Tertiary consumers \(\rightarrow \) Primary consumers \(\rightarrow \)Secondary consumers \(\rightarrow \) Producers

(c)

Tertiary consumers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Producers

(d)

Tertiary consumers \(\rightarrow \) Producers \(\rightarrow \) Primary consumers \(\rightarrow \) Secondary consumers

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

The following diagram represents

 

(a)

pyramid of number in a grassland ecosystem

(b)

pyramid of number in a pond ecosystem

(c)

pyramid of number in a forest ecosystem

(d)

pyramid of biomass in a pond ecosystem