Define ectoparasite and endoparasite and | Class 12 Biology Chapter Organisms and Population, Organisms and Population NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 11 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Organisms and Population. This page offers a step-by-step solution to the specific question from Exercise 0, Question 18:

Define ectoparasite and endoparasite and give suitable examples.

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 18:

Define ectoparasite and endoparasite and give suitable examples.

Answer:

A parasite is an organism which obtains its nutrients from one or a very few host individuals that cause harm but not responsible for immediate death. These can be temporary (which comes in contact with host for a short period, example: female mosquitoes like Ades, Culex) or permanent (which remains in contact with the host throughout their life, example: Entamoeba histolytica). Depending on either parasites live within the host or on the host, are classified into two categories: Ectoparasite and Endoparasite.   

Ectoparasite: Parasites that lives on the surface of the host are known as Ectoparasite. For example: some mites, lice on humans and ticks on dogs.

Endoparasite: Parasites that lives inside the body of host are known as Endoparasite. For example: Hookworms that lives inside the host’s gut, the human liver fluke (a trematode parasite).

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 Organisms and Population.
  • 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.

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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 18: Define ectoparasite and endoparasite and give suitable examples.....

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