AIPMT-PRELIMS Botany Ecosystem Class 12 Questions
20 questions
Identify the possible line “A” in the following food chain: Plant → insect → frog → “A” → Eagle
The upright pyramid of number is absent in
Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
Mass of living matter at a trophic level in an area at any time is called
What type of human population is represented by the following pyramid?
The biomass available for consumption by the herbivores and the decomposers is called
A country with a high rate of population growth took measures to reduce it. The Figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them:
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
About 70% of total global carbon is found in:
Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels
The slow rate of decomposition of fallen logs in nature is due to their:
Which one of the following ecosystem types has the highest annual net primary productivity?
Which one of the following is not used for construction of ecological pyramids?
What is a keystone species ?
Which of the following is expected to have the highest value (gm/m²/yr) in a grassland ecosystem :-
Organisms which obtain energy by the oxidation of reduced inorganic compounds are called :-
Bamboo plant is growing in a far forest then what will be the trophic level of it:
Plant Decomposers are :-
Which is the reason for highest biomass in aquatic ecosystem :