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Question 1 of 5
1. Question
2 points
In the study of ecology, which of the following pyramids is/are always upright?
Pyramid of biomass
Pyramid of numbers
Pyramid of energy
Select the correct answer using the code given below:
Correct
Answer: C Explanation:
The energy pyramid is always upright, and it cannot be inverted as energy is always lost from one tropic level to the next. Therefore, the base of the pyramid is large.
Number pyramid and biomass pyramid can also be inverted.
Incorrect
Answer: C Explanation:
The energy pyramid is always upright, and it cannot be inverted as energy is always lost from one tropic level to the next. Therefore, the base of the pyramid is large.
Number pyramid and biomass pyramid can also be inverted.
Question 2 of 5
2. Question
2 points
Which of the following is/are not a measure of species diversity?
Species richness
Species abundance
Taxonomic diversity
Select the correct answer using the code given below:
Correct
Answer: D
Explanation:
Species diversity can be measured in terms of:
Species richness – refers to the number of various species in a defined area.
Species abundance – refers to the relative numbers among species. E.g. the number of species of plants, animals and microorganisms may be more in an area than that recorded in another area.
Taxonomic or phylogenetic diversity – refers to the genetic relationships between different groups of species.
Incorrect
Answer: D
Explanation:
Species diversity can be measured in terms of:
Species richness – refers to the number of various species in a defined area.
Species abundance – refers to the relative numbers among species. E.g. the number of species of plants, animals and microorganisms may be more in an area than that recorded in another area.
Taxonomic or phylogenetic diversity – refers to the genetic relationships between different groups of species.
Question 3 of 5
3. Question
2 points
Consider the following description:
“The area is located near the mouth of a river. It supports thick mangrove vegetation. There is a considerable population of saltwater crocodile in the area. It faces the ecological threat of freshwater diversion from the river for industrial use.”
Which of the following protected area is described in the above paragraph?
Correct
Answer: B
Explanation:
Bhitarkanika wildlife sanctuary is located in Odisha near the mouth of the Brahmani river.
It has a dense mangrove forest that survives in brackish water.
It is an important habitat of the saltwater crocodile.
In recent times, Talcher coal mines and nearby steal plants are consuming more freshwater from Brahmani water, thereby affecting the ecological flow of the river. This is affecting the ecology of the Bhitarkanika area.
Incorrect
Answer: B
Explanation:
Bhitarkanika wildlife sanctuary is located in Odisha near the mouth of the Brahmani river.
It has a dense mangrove forest that survives in brackish water.
It is an important habitat of the saltwater crocodile.
In recent times, Talcher coal mines and nearby steal plants are consuming more freshwater from Brahmani water, thereby affecting the ecological flow of the river. This is affecting the ecology of the Bhitarkanika area.
Question 4 of 5
4. Question
2 points
Consider the following group of organisms: ‘Anabaena, Azotobacter, Pseudomonas, Rhizobium.’
Choose the odd one out from the group and select the correct answer using the code given below:
Correct
Answer: C
Explanation:
Nitrogen-fixing bacteria: Azotobacter (free-living bacteria), Rhizobium (symbiotic living with leguminous plants), Anabaena (Cyanobacteria)
Pseudomonas is denitrifying bacteria (convert nitrate to free nitrogen).
Incorrect
Answer: C
Explanation:
Nitrogen-fixing bacteria: Azotobacter (free-living bacteria), Rhizobium (symbiotic living with leguminous plants), Anabaena (Cyanobacteria)
Pseudomonas is denitrifying bacteria (convert nitrate to free nitrogen).
Question 5 of 5
5. Question
2 points
Methane is an important greenhouse gas contributing to global warming. Which of the following activities result into the release of methane into the atmosphere?
Burning of biomass
Livestock rearing
Rice cultivation
Urban waste disposal in landfills
Coal mining
Select the correct answer using the code given below:
Correct
Answer: D
Explanation:
The following activities result into the release of methane into the atmosphere:
Burning of biomass
Livestock rearing
Rice cultivation
Urban waste disposal in landfills
Coal mining
Processing of natural gas
Wastewater treatment
Incorrect
Answer: D
Explanation:
The following activities result into the release of methane into the atmosphere:
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