Which group of organism occupies the third tropic level in an ecosystem?

(a)

Primary consumers

(b)

Secondary consumers

(c)

Secondary carnivores

(d)

Omnivores

If 1200 Joules of solar energy is trapped by producers, how much of Joules of energy does the organism in the third trophic level will receive?

(a)

120 Joules

(b)

12 Joules

(c)

1.2 Joules

(d)

0.12 Joules

Spindle shaped pyramid is a character of ______

(a)

Pond ecosystem

(b)

Grassland ecosystem

(c)

Parasite ecosystem

(d)

Forest ecosystem

The bottom most zone of a pond is termed as .

(a)

Limnetic zone

(b)

Littoral zone

(c)

Benthic zone

(d)

Profundal zone

_________is the climax community of hydro sere.

(a)

Reed swamp stage

(b)

Marsh medow stage

(c)

Shrub stage

(d)

Forest stage