The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc. present in the soil at any given time, is referred to as the [2021]
In relation to Gross primary productivity and Net primary productivity of an ecosystem. Which one of the following statements is correct? [2020]
1 Crore+ students have signed up on EduRev. Have you? Download the App |
Which ot the following ecological pyramids is generally inverted? [2019]
What type of ecological pyramid would be obtained with the following data? [2018)]
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
Match the following and select the correct option: [2014]
Vertical distribution of different species occupying different levels in a biotic community is known as: [2015 RS]
The mass of living material at a trophic level at a particular time is called: [2015 RS]
In an ecosystem the rate of production of organic matter during photosynthesis is termed as: [2015 RS]
Secondary Succession takes place on/in: [2015 RS]
The following graph depicts changes in two populations (A and B) of herbivores in a grassy field A possible reason for these changes is that: [2015 RS]
During ecological succession: [2015 RS]
Increase in concentration of the toxicant at successive trophic levels is known as: [2015 RS]
Industrial melanism is an example of: [2015 RS]
In which of the following both pairs have a CORRECT combination? [2015 RS]
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by: [2015 RS]
An association of individuals of different species living in the same habitat and having functional interactions is: [2015 RS]
Which of the following is a characteristic feature of the cropland ecosystem? [2016]
Which of the following would appear as the pioneer organisms on bare rocks? [2016]
The term ecosystem was coined by
86 videos|294 docs|185 tests
|