Ecosystem
- Which one of the following ecosystem types has the highest annual net primary productivity?
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They are found in the equatorial regions rainfall exceeds 140 cm. The warm humid climate supports broad leaved evergreen plants. Productivity is very high (12000 kcal/ m2 /year). The vegetation show stratification into two or more well defined layers.
Correct Option: D
They are found in the equatorial regions rainfall exceeds 140 cm. The warm humid climate supports broad leaved evergreen plants. Productivity is very high (12000 kcal/ m2 /year). The vegetation show stratification into two or more well defined layers.
- Which of the following is expected to have the highest value (gm/m2 /yr) in a grassland ecosystem?
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Grasslands will have highest value of gross production. Net production is obtained after subtracting the respiratory utilization from gross production. Secondary and tertiary production is related with secondary and tertiary consumers respectively.
Correct Option: C
Grasslands will have highest value of gross production. Net production is obtained after subtracting the respiratory utilization from gross production. Secondary and tertiary production is related with secondary and tertiary consumers respectively.
- Pneumatophores are characteristic of plants growing in
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Some plants growing in salty marshes develop special roots for respiration, called pneumatophores. They are (–)vely geotropic.
Correct Option: C
Some plants growing in salty marshes develop special roots for respiration, called pneumatophores. They are (–)vely geotropic.
- The greatest biomass of autotrophs in the oceans is that of
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The greatest biomass of autotrophs in the oceans is that of free floating microalgae, cyanobacteria and nanoplankton.
Correct Option: B
The greatest biomass of autotrophs in the oceans is that of free floating microalgae, cyanobacteria and nanoplankton.
- Which of the following ecosystems has highest rate of gross primary production?
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Equatorial forest has highest gross primary production i.e. productivity is maximum hare 12000 Kcal/m2 /yr. Coral reefs are often called "rainforest of the sea". It forms some of the most diverse ecosystem on earth. Coral reef ecosystem have the highest gross primary productivity in the sea.
Correct Option: D
Equatorial forest has highest gross primary production i.e. productivity is maximum hare 12000 Kcal/m2 /yr. Coral reefs are often called "rainforest of the sea". It forms some of the most diverse ecosystem on earth. Coral reef ecosystem have the highest gross primary productivity in the sea.
