Ecological Pyramids

Which one of the following is not used for the construction of ecological pyramids?

1.	Dry weight	2.	Number of individuals
3.	Rate of energy	4.	Fresh weight

The correct sequence of plants in a Hydrosphere is:

1.	Oak → Lantana → Scirpus → Pistia → Hydrilla → Volvox
2.	Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
3.	Pistia → Volvox → Scirpus → Hydrilla → Oak → Lantana
4.	Oak → Lantana → Volvox → Hydrilla → Pistia → Scirpus

Which one of the following statements is correct for secondary succession?

1.	It occurs on a deforested site
2.	It follows primary succession
3.	It is similar to primary succession except that it has a relatively slow pace
4.	All of the above

Which one of the following statements for a pyramid of energy is incorrect, whereas the remaining three are correct?

1.	It shows the energy content of different trophic-level organisms
2.	It is inverted in shape
3.	It is upright in shape
4.	Its base is broad

Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels? 

1.	Level PC is insects and level SC is small insectivorous birds
2.	Level PP is phytoplanktons in the sea and Whale on top-level TC
3.	Level PP is pipal trees and the level SC is sheep
4.	Level PC is rats and level SC is cats

The upright pyramid of number is absent in:

1. Pond

2. Forest

3. Lake

4. Grassland

What type of ecological pyramid would be obtained with the following data?

Secondary consumer: 120 g

Primary consumer: 60 g

Primary producer: 10 g

1. Inverted pyramid of biomass

2. Pyramid of energy

3. Upright pyramid of numbers

4. Upright pyramid of biomass

Which of the following ecological pyramids is generally inverted?

1.	Pyramid of biomass in a sea
2.	Pyramid of numbers in grassland
3.	Pyramid of energy
4.	Pyramid of biomass in a forest

Which of the following statements is incorrect?

1.	Biomass decreases from first to fourth trophic level.
2.	Energy content gradually increases from first to fourth trophic level.
3.	Number of individuals decreases from first trophic level to fourth trophic level.
4.	Energy content gradually decreases from first to fourth trophic level.

Which of the following statements is not correct?

1.	Pyramid of energy is always upright.
2.	Pyramid of numbers in a grassland ecosystem is upright.
3.	Pyramid of biomass in sea is generally inverted.
4.	Pyramid of biomass in sea is generally upright.