How is the presently occurring species e | Class 12 Biology Chapter Biodiversity and Conservation, Biodiversity and Conservation NCERT Solutions

Question:

How is the presently occurring species extinction different from the earlier mass extinctions?

Answer:

Extinction is a natural process which refers to the complete disappearance of a species from the Earth. In earlier times, species extinction occurred naturally, i.e. in the absence of human interference which is known as natural extinction. Natural extinction occurs by various causes like volcanic eruption, climate change, sea level change etc. But in present times, the species extinction occurs due to the anthropogenic activities (human interference) which causes very severe depletion of biodiversity. Anthropogenic activities that causes species extinction are as follows: habitat destruction, overexploitation, global warming etc.

1
0
0
Report?

Report a problem on Specifications:

Email id:

Comments

< Previous Question

Next Question >

Popular questions of class 12 Biology

Q: What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q: Why is reproduction essential for organisms? Answer

Q: Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals.

Q: With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q: What is DNA fingerprinting? Mention its application.

Q: Describe the structure of a seminiferous tubule.

Q: What is oogenesis? Give a brief account of oogenesis.

Q: What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Q: With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q: Explain the Law of Dominance using a monohybrid cross.

Recently Viewed Questions of Class 12 Biology

Q: What are chasmogamous flowers? Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.

Can you think of a scientific explanation, besides analogy used by Paul Ehrlich, for the direct relationship between diversity and stability of an ecosystem?

What is an algal bloom?

What is brood parasitism? Explain with the help of an example.

Q: Differentiate between the followings:
(a) Repetitive DNA and Satellite DNA
(b) mRNA and tRNA
(c) Template strand and Coding strand

Q: Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.

Q: What is apiculture? How is it important in our lives?

Restriction enzymes that are used in the construction of recombinant DNA are endonucleases which cut the DNA at ‘specific-recognition sequence’. What would be the disadvantage if they do not cut the DNA at specific-recognition sequence?

How do you distinguish between humification and mineralisation?

Q: If the sequence of one strand of DNA is written as follows:
5-ATGCATGCATGCATGCATGCATGCATGC-3
Write down the sequence of complementary strand in 5→3 direction

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Biodiversity and Conservation.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Notice: Undefined index: quesId in /var/www/html/ss_beta/saralstudy/ss_new/web/template/common/comment_section.php on line 3

Comments

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 1: How is the presently occurring species extinction different from the earlier mass extinctions?....

How is the presently occurring species e | Class 12 Biology Chapter Biodiversity and Conservation, Biodiversity and Conservation NCERT Solutions

< Previous Question

Next Question >

Popular questions of class 12 Biology

Recently Viewed Questions of Class 12 Biology

Study Tips for Answering NCERT Questions:

Comments

Comment(s) on this Question

Chapters for Class 12 Biology

Subjects for Class 12

Students Also Read

Important links

Quick Links

Resources

Support