NCERT Solutions Class 12 Biology Chapter 15 Biodiversity and Conservation

Scroll down for PDF

NCERT Solutions Class 12 Biology Chapter 15 Biodiversity and Conservation. 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 15 Biodiversity and Conservation

Question 1: Name the three important components of biodiversity.

Answer Biodiversity is the variety of living forms present in various ecosystems. It includes variability among life forms from all sources including land, air, and water. Three important components of biodiversity are:

(a) Genetic diversity

(b) Species diversity

(c) Ecosystem diversity

Question 2: How do ecologists estimate the total number of species present in the world?

Answer The diversity of living organisms present on the Earth is very vast. According to an estimate by researchers, it is about seven millions. The total number of species present in the world is calculated by ecologists by statistical comparison between a species richness of a well studied group of insects of temperate and tropical regions. Then, these ratios are extrapolated with other groups of plants and animals to calculate the total species richness present on the Earth.

Question 3: Give three hypotheses for explaining why tropics show greatest levels of species richness.

Answer There are three different hypotheses proposed by scientists for explaining species richness in the tropics.

(1) Tropical latitudes receive more solar energy than temperate regions, which leads to high productivity and high species diversity.

(2) Tropical regions have less seasonal variations and have a more or less constant environment. This promotes the niche specialization and thus, high species richness.

(3) Temperate regions were subjected to glaciations during the ice age, while tropical regions remained undisturbed which led to an increase in the species diversity in this region.

Question 4: What is the significance of the slope of regression in a species − area relationship?

Answer The slope of regression (z) has a great significance in order to find a species-area relationship. It has been found that in smaller areas (where the species-area relationship is analyzed), the value of slopes of regression is similar regardless of the taxonomic group or the region. However, when a similar analysis is done in larger areas, then the slope of regression is much steeper.

Please click the link below to download NCERT Solutions Class 12 Biology Chapter 15 Biodiversity and Conservation.

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

JEE Main registration 2020 List of qualifying exams

JEE Main registration 2020: List of qualifying exams The process of JEE (Joint Entrance Examination) Main has already been started from September 3, 2019, on the official website of JEE, i.e. jeemain.nic.in. The interested and eligible students can also apply for JEE...

CBSE schools to have sports period daily for classes 1 to 12

CBSE schools to have sports period daily for classes 1 to 12, new curriculum introduced All work and no play makes a child dull. Nowadays students have a very hectic schedule so that they cannot take out time to play games and gently start ignoring sports. Therefore,...

What Is The Secret Of Choosing A Good Tutor For Your Child?

Is your child lost in the maze of syllabus, chapters, millions of topics and huge books? Does your child feel lost in a class filled with many students? Is your child unable to bring in the best results? Well, then, you definitely need to find some alternative...

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...

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...

CBSE schools to participate in National Assessment

CBSE schools to participate in National Assessment for Scientific Temperament and Aptitude According to the latest reports, CBSE has asked all its affiliated schools to encourage and motivate the students to participate in a national assessment programme which is...

×
Studies Today