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Ecosystem

AIPMT 2008MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2008

About 70% of total global carbon is found in:

  1. Grasslands
  2. Agroecosystems
  3. Oceans
  4. Forests

Answer

(3) Oceans

Solution

⇒ As per NCERT (carbon cycle), about 71 per cent of the global carbon is found dissolved in the oceans; this oceanic reservoir regulates the amount of carbon dioxide in the atmosphere.

∴ About 70% of the total global carbon is found in the oceans.

Answer: (3)

Keep practising — Ecosystem

Ques. 2AIPMT 2007

Which one of the following ecosystem types has the highest annual net primary productivity ?

  1. Temperate evergreen forest
  2. Temperate deciduous forest
  3. Tropical rain forest
  4. Tropical deciduous forest
Ques. 3AIPMT 2006

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

  1. Rate of energy flow
  2. Dry weight
  3. Fresh weight
  4. Number of individuals
Ques. 4AIPMT 2004

Which of the following is expected to have the highest value (g/m2/yr) in a grassland ecosystem ?

  1. Net production (NP)
  2. Secondary production
  3. Tertiary production
  4. Gross production (GP)
Ques. 5AIPMT 2002

Bamboo plant is growing in a far forest then what will be the trophic level of it ?

  1. Second trophic level (T2)
  2. First trophic level (T1)
  3. Fourth trophic level (T4)
  4. Third trophic level (T3)
Ques. 6AIPMT 2001

Plant decomposers are:

  1. Protista and Animalia
  2. Animalia and Monera
  3. Monera and fungi
  4. Fungi and plants
Ques. 7AIPMT 2000

Which is the reason for highest biomass in aquatic ecosystem?

  1. Benthonic and brown algae
  2. Nanoplankton, blue green algae, green algae
  3. Diatoms
  4. Sea grass and slime moulds

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