EASY
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Which of the following occupies the base of the ecological pyramid?

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Important Questions on Ecosystem

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What fraction of the assimilated energy is used in respiration by the herbivores?
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Biological diversity increases with the productivity of an ecosystem. In which of the following habitats do we see the greatest diversity of species?
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Which of the following plant traits (characters) is NOT an adaptation to dry (Xeric) habitats?
EASY
Which ONE of the following options lists the primary energy source(s) for all forms of life on earth?
HARD
What type of ecological pyramid would be obtained with following data?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
EASY
The monarch butterfly avoids predators such as birds by:
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Individuals of one kind occupying a particular geographic area at a given time are called
MEDIUM
A desert lizard (an ectotherm) and a mouse (an endotherm) are placed inside a chamber at 15oC and their body temperature [T (L) for the lizard and T (M) for the mouse] and metabolic rates [M (L) for the lizard and M (M) for the mouse] is monitored. Which one of the following is correct?
MEDIUM
The study of the relationship between living things and their environment is called _____.
EASY
Most animals that live in deep oceanic waters are:
EASY
If rice is cooked in a pressure cooker on the Siachen glacier, at sea beach, and on Deccan plain, which of the following is correct about the time taken for cooking rice?
MEDIUM
Which of the following statements is incorrect?
EASY
Stratification is more common in which of the following?
MEDIUM
Many population colonising a new habitat show a logistic population growth pattern over time, as shown in the figure below.

Question Image

In such a population, the POPULATION growth rate:
EASY
Which of the following interactions does NOT promote coevolution?
MEDIUM
Which ONE of the following statements about ecosystem energetics is INCORRECT?
EASY

Match the trophic levels with their correct species examples in grassland ecosystem.

(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass

Select the correct option.

EASY
Which one of the following class of animals constitutes the largest biomass on earth?
MEDIUM
Which of the following statements is not correct?
EASY
Which of the following ecological pyramids is generally inverted?