Concept of Trophic Levels

Q. The primary producers of the deep-sea hydrothermal vent ecosystem are

1. coral reefs
2. green algae
3. chemosynthetic bacteria
4. blue-green algae

Q.

Each step of a food chain represents:

1. Food web

2. Sere

3. Trophic level

4. Consumers

Q.
Which of the following autotrophs are the dominant producers of marine ecosystems?

1. Benthic brown algae and red algae
2. Benthic diatoms and marine viruses
3. Sea grasses and slime moulds
4. Free floating algae, microalgae, cyanobacteria

Q.

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

1. 1%

2. 10%

3. 40%

4. 90%

Q. Which of the following occupies the same trophic level?

1. Crow and cow
2. Snake and earthworm
3. Tiger and wild boar
4. Deer and bee

Q. The dominant second trophic level in a lake ecosystem is:

1. Zooplanktons
2. Fishes
3. Phytoplanktons
4. Frogs

Q.

What is the first trophic level in a lake ecosystem?

1. Benthos

2. Plankton

3. Zooplankton

4. Phytoplankton

Q.

Bamboo trees growing in a fir (species of evergreen coniferous trees) forest belong to which trophic level ?

1. First trophic level (T1)

2. Second trophic level (T2)

3. Third trophic level (T3)

4. Fourth trophic level (T4)

Q.

Nepenthes belongs to the category of

1. primary consumer

2. producer

3. secondary consumer

4. both b and c

Q.

Bamboo trees growing in a fir (species of evergreen coniferous trees) forest belong to which trophic level ?

1. First trophic level (T1)

2. Second trophic level (T2)

3. Third trophic level (T3)

4. Fourth trophic level (T4)