|

Class 12 Biology Chapter 14 MCQs (Ecosystems and Energy flow MCQ)

Class 12 biology chapter 14 MCQs (Ecosystems and Energy flow MCQ)
 

Class 12 Biology Chapter 14 MCQs (Ecosystems and Energy flow MCQ)

 
1. Which one of the following has the largest population in a food chain?
    a. Producers
    b. Primary consumers
    c. Secondary consumers
    d. Decomposers
Answer : Decomposers
Explanation :Decomposers include micro-organisms such as bacteria and fungi. They form the largest population in a food chain and obtain nutrients by breaking down the remains of dead plants and animals.
 
 
 
 
 
 
 
2. The second trophic level in a lake is ________________
    a. Phytoplankton
    b. Zooplankton
    c. Benthos
    d. Fishes
Answer : zooplankton
Explanation :Zooplankton are primary consumers in aquatic food chains. They feed upon phytoplankton. They are present in the second trophic level. Hence, second most important trophic level in a lake is zooplankton.
 
 
3. Secondary consumers are __________
    a. Herbivores
    b. Producers
    c. Carnivores
    d. Autotrophs
Answer : Carnivores
Explanation :Secondary consumers are usually carnviores (meat eaters) but can also be omnivores. Omnivorous consumers eat everything.
 
 
4. What is the % of photosynthetically active radiation in the incident solar radiation?
    a. 100%
    b. 50 %
    c. 1-5%
    d. 2-10%
Answer : 50%
Explanation : Out of total incident solar radiation, about fifty percent of it forms photosynthetically active radiation or PAR.
 
 
5. Give the term used to express a community in its final stage of succession?
    a. End community
    b. Final community
    c. Climax community
    d. Dark community
Answer : Climax community
Explanation:The term climax community is used to express a community in its final stage of successionThe climax community may change if there are changed in climate or long term evolutionary changes in species.
 
 
6. After landslide which of the following type of succession occurs?
    a. Primary
    b. Secondary
    c. Tertiary
    d. Climax
Answer : Primary
Explanation: Succession is generally regarded as primary when it occurs on a landslide where rock and subsoil, virtually free of organic matter are exposed, despite the fact that landslide was formed the substratum just beneath a developed soil carrying vegetation.
 
 
7. Which of the following is most often a limiting factor of the primary productivity in any ecosystem.
    a. Carbon
    b. Nitrogen
    c. Phosphorus
    d. Sulphur
Answer : Carbon
 
Class 11 Physics MCQ Chapter-wiseNEET Biology MCQ Chapter-wise PDF Free Download
NEET PYQ Biology Chapter-wise PDFNEET Gujarati Medium Books PDF
Biology Class 12 MCQ Questions with Answers PDF DownloadNEET Biology Questions
NEET Chemistry Questions Chapter-wise PDFNEET Chapter-wise Previous Year Questions Free Download PDF
NEET MCQNEET Chemistry MCQ Topicwise and Chapterwise with Answers
CBSE Class 11 Biology Practical SyllabusDownload KVPY Syllabus for Stream SA, SB and SX Updated PDF
NEET Syllabus for Beginners: Complete Guide to NEET SyllabusMCQs on Hydraulics and Pneumatics
CBSE Class 12 Biology Practical SyllabusUpdated CBSE Class 11 Biology Syllabus
CBSE Class 12 Biology SyllabusClass 12 Biology Textbook Solutions Maharashtra Board
Maharashtra Board Classwise Science Textbook SolutionsMaharashtra Board Class 11 Biology Textbook Solutions

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *