Are you looking for Mcqs on Ecosystem? If Yes then you are at right place. Here you will find Ecosystem Mcq Questions and Answers, Trivia, Quiz, Interview MCQ & Ecosystem Current Affairs for Competitive Exams like Neet exams, around 30% to 40% of Neet questions are asked from given Ecosystem Mcqs. as you know Questions and Ansers on Ecosystem is very important for Neet Exam. In this Ecosystem MCQ section for Neet competition we are covering MCQS on Ecosystem
Question : Phosphorus usually becomes a limiting factor at certain times of the year in which ecosystem?
A. Aquatic ecosystem
B. Grassland ecosystem
C. Forest ecosystem
D. All of the above
Question : Which one of the following is a major constituent of biological membranes, nucleic acids and cellular energy transfer systems?
A. Phosphorus
B. Carbon
C. Oxygen
D. Nitrogen
Question : Decomposers of an ecosystem include?
A. microscopic animals
B. bacteria and fungi
C. Both (a) and (b)
D. Bacteria, fungi and microscopic animals
Question : What is the natural reservoir of phosphorus?
A. Animal bones
B. Rock
C. Fossils
D. Seawater
Question : When the number of organisms at successive levels are plotted, they assume the shape of a pyramid. This is called the pyramid of?
A. energy
B. number
C. biomass
D. both (a) and (c)
Question : Where do herbivores/deer fit into a food chain?
A. Primary producers
B. Primary consumers
C. Secondary consumers
D. Decomposers
Question : The slow rate of decomposition of fallen logs in nature is due to theirs?
A. low moisture content
B. poor nitrogen content
C. the anaerobic environment around them
D. low cellulose content
Question : Pyramid of numbers is?
A. Always upright
B. Always inverted
C. Either upright or inverted
D. Neither upright nor inverted
Question : Approximately 70% of the world’s fresh water is contained in?
A. polar ice
B. glaciers and mountains
C. Antarctica
D. Greenland
Question : Last stabilised community in a plant succession is known as?
A. Seral community
B. Pioneer community
C. Ecosere
D. Climax community
Question : Tip of the ecological pyramid is occupied by?
A. producers
B. herbivores
C. carnivores
D. omnivores
Question : In the grass-deer-tiger food chain, grass biomass is one tonne. The tiger biomass shall be?
A. 100 kg
B. 10 kg
C. 200 kg
D. 1 kg
Question : What percentage of the PAR is captured by the plants?
A. 5 – 10%
B. 7 – 10%
C. 8 – 10%
D. 2 – 10%
Question : Among the following biogeochemical cycles which one does not have losses due to respiration?
A. Phosphorus
B. Nitrogen
C. Sulphur
D. All of the above
Question : Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
A. Fish
B. Zooplankton
C. Frog
D. Phytoplankton