NCERT Solutions Class 12 Biology Chapter 14 Ecosystem

Scroll down for PDF

NCERT Solutions Class 12 Biology Chapter 14 Ecosystem. The NCERT solutions for Class 11 Mathematics have been made by Mathematics teacher of one of the best CBSE school in India. These NCERT solutions have been made to give detailed answers and expanations of the concepts as per NCERT which can be easily understood by the students. Refer to other links also to download mathematics NCERT solutions, worksheets, sample papers and Exemplar Solutions.

Class 12 Biology

NCERT Solutions

Chapter 14 Ecosystem

Question 1: Fill in the blanks.

(a) Plants are called as_________ because they fix carbon dioxide.

(b) In an ecosystem dominated by trees, the pyramid (of numbers) is _________ type.

(c) In aquatic ecosystems, the limiting factor for the productivity is _________.

(d) Common detritivores in our ecosystem are_________.

(e) The major reservoir of carbon on earth is_________.

Question 2: Which one of the following has the largest population in a food chain?

(a) Producers

(b) Primary consumers

(c) Secondary consumers

(d) Decomposers

Answer (d) Decomposers

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.

Question 3: The second trophic level in a lake is-

(a) Phytoplankton

(b) Zooplankton

(c) Benthos

(d) Fishes

Answer (b) Zooplankton

Zooplankton are primary consumers in aquatic food chains that feed upon phytoplankton. Therefore, they are present at the second trophic level in a lake.

Question 4: Secondary producers are

(a) Herbivores

(b) Producers

(c) Carnivores

(d) None of the above

Answer (d) None of the above

Plants are the only producers. Thus, they are called primary producers. There are no other producers in a food chain.

Question 5: What is the percentage of photosynthetically active radiation (PAR), in the incident solar radiation.

(a) 100%

(b) 50 %

(c) 1-5%

(d) 2-10%

Answer (b) 50%

Out of total incident solar radiation, about fifty percent of it forms photosynthetically active radiation or PAR.

Question 6: Distinguish between

(a) Grazing food chain and detritus food chain

(b) Production and decomposition

(c) Upright and inverted pyramid

(d) Food chain and Food web

(e) Litter and detritus 

(f) Primary and secondary productivity

Please click the link below to download NCERT Solutions Class 12 Biology Chapter 14 Ecosystem.

Tags: 


Click on the text For more study material for Biology please click here - Biology

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

UP government schools will follow NCERT

UP government schools will follow NCERT pattern from April 2020Are you appearing for the UP exams 2020? If yes, then you have to see what major changes UP government schools have brought for 2020.The UP government is fully prepared to implement NCERT pattern for...

IBM to Set AI Curriculum for CBSE Class IX to XII

The Central Board of Secondary Education has tied up with IBM to develop a course of Artificial Intelligence in the CBSE curriculum. Now CBSE is going to introduce Artificial Intelligence as an elective subject for class 9 to 12th. The CBSE has taken this decision to...

5 Signs Why Your Child Needs a Tutor

Is your child struggling at school? Are they leaving assignments incomplete? When it comes to education every student is different. Some children do well with the help of the teacher at school and an active parent while others need extra help. When children have...

Sample Papers for Class 12 Boards 2020

CBSE has released the final sample papers for the class 12 boards exams as per the new pattern as per which the question papers are expected to come in the 2020 board exams for class 12. The sample papers have been for class 12 for all subjects along with the suggested...

Top Classroom Challenges According to the Teachers

Teacher plays a major role in our lives in the classrooms. Not only is studying, but the teacher also serves many other roles in the classrooms. A teacher is always a role model for a student who can inspire him to live a better future life. Besides this, life of a...

CBSE Registration 2019-2020

CBSE Registration 2019-2020: Check latest rules for students' registration in class IX and XI The Central Board of Secondary Education (CBSE) has changed the registration rules for class 9 to streamline the processes related to examinations in a time-efficient manner...

×
Studies Today