One always finds many more of the prey species than of the predator. This is called a
food web
pyramid of numbers
pyramid of succession
none of these
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- The main cause of soil erosion in India is
- In a food-chain, the saprophytic organisms are
- An organism which lives at the expense of another organism is called
- The most polluted city in the world is
- The total interacting animals and plants in any well defined area which as field or a pond is known…
- Soil particles are arranged in order of increasing size are
- Strontium- 90 can cause
- Smog is a combination of
- Trophic levels are formed by
- The term "ecosystem" was first proposed by
- Birth rate under ideal conditions is known as
- One always finds many more of the prey species than of the predator. This is called a
- Bio tic factors are
- Synecology is the study of
- Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
- Animals which live at the bottom of the sea are called
- Association of a sea-anemone with hermit crab living in a gastropod shell is an example of
- The source of energy in an ecosystem is
- Which one is the direct ecological factor ?
- An association between two or more species in which both are benefited is known as
- Silent valley of Kerala is preserved because
- Pedology is the study of
- Plants growing on sea shores show characters of
- Which of the following is normally not an important atmospheric pollutant
- Biological equilibrium is equilibrium among the
- Desert animals are called
- Species that occur in different geographical regions separated by special barriers are
- Some animals have a constant high body temperature. This is because
- When compared to the trophic level above, the total energy present in any given trophic level is necessarily
- The transitional zone where two different types of communities meet is called the