Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8th
Advertisement Remove all ads

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 16 - Microorganisms [Latest edition]

Chapters

Class 8th Science Answers Guide - Shaalaa.com
Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

Chapter 16: Microorganisms

Exercise
Advertisement Remove all ads
Exercise [Page 189]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 189]

Choose the best answer.

Exercise | Q I. 1. | Page 189

Microorganisms are measured in _______.

  • cm

  • mm

  • micron

  • meter

Exercise | Q I. 2. | Page 189

_______ shows both living and nonliving characteristics.

  • Protozoa

  • Virus

  • Bacteria

  • Fungi

Exercise | Q I. 3. | Page 189

______ is a prokaryotic microorganisms.

  • Virus

  • Algae

  • Fungi

  • Bacteria

Exercise | Q I. 4. | Page 189

Based on shape, the bacteria are classified into _______ types.

  • two

  • three

  • four

  • five

Exercise | Q I. 5. | Page 189

Common cold in human is caused by ______.

  • plasmodium

  • influenza

  • vibrio cholera

  • aphthovirus

Exercise [Page 189]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 189]

Fill in the blanks.

Exercise | Q II. 1. | Page 189

_______ is prepared from a mould called penicillium.

Exercise | Q II. 2. | Page 189

_______ are the infectious protein particles.

Exercise | Q II. 3. | Page 189

The infecting virus particle found outside the host cell is _______.

Exercise | Q II. 4. | Page 189

Microorganism can be seen with the help of a _______.

Exercise | Q II. 5. | Page 189

Bacteria, which has a flagellum at one end is classified as _______.

Exercise [Pages 189 - 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Pages 189 - 190]

State true or false. If false, correct the statement.

Exercise | Q III. 1. | Page 189

Disease-causing microorganisms are called pathogens.

  • True.

  • False

Exercise | Q III. 2. | Page 190

Female anopheles mosquito is a carrier of dengue virus.

  • True

  • False

Exercise | Q III. 3. | Page 190

Chicken pox is a communicable disease.

  • True

  • False

Exercise | Q III. 4. | Page 190

Citrus canker is transmitted by insects.

  • True

  • False

Exercise | Q III. 5. | Page 190

Yeast is used in the large-scale production of alcohol.

  • True

  • False

Exercise [Page 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 190]

Exercise | Q IV. | Page 190

Match the following.

Nitrogen-fixing bacteria Vaccine
Tuberculosis Prion
Kuru Lactobacillus acidophilus
Probiotics Bacteria
Edward Jenner Rhizobium
Exercise [Page 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 190]

Answer the following questions.

Exercise | Q V. 1. | Page 190

Mark the correct one as:

Assertion: Malaria is caused by Protozoa.

Reason: The disease is transmitted by mosquito.

  • If both assertion and reason are true and the reason is the correct explanation of assertion.

  • If both assertion and reason are true and reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.

Exercise | Q V. 2. | Page 190

Mark the correct one as:

Assertion: Algae are heterotrophic.

Reason: They do not have chlorophyll.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true and reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.

Exercise [Page 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 190]

Answer very briefly.

Exercise | Q VI. 1. | Page 190

Write the name of any nitrogen fixing bacteria.

Exercise | Q VI. 2. | Page 190

Name the bacteria used in the production of vinegar.

Exercise | Q VI. 3. | Page 190

Write the names of any three protozoans.

Exercise | Q VI. 4. | Page 190

Who discovered penicillin?

Exercise | Q VI. 5. | Page 190

Which diseases can be prevented by vaccination?

Exercise [Page 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 190]

Answer briefly.

Exercise | Q VII. 1. | Page 190

Write the four types of bacteria, based on their shape.

Exercise | Q VII. 2. | Page 190

What are antibiotics?

Exercise | Q VII. 3. | Page 190

What are pathogens?

Exercise | Q VII. 4. | Page 190

How disease causing microorganisms enter into human beings?

Exercise | Q VII. 5. | Page 190

Why microorganisms are essential for agriculture?

Exercise [Page 190]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 16 MicroorganismsExercise [Page 190]

Answer in detail.

Exercise | Q VIII. 1. | Page 190

Write a short note on bacteria and its structure.

Exercise | Q VIII. 2. | Page 190

How microorganisms are useful in the field of medicine?

Exercise | Q VIII. 3. | Page 190

Write a short note on common human diseases caused by microorganisms.

Exercise | Q VIII. 4. | Page 190

How can we improve the beneficial bacterial count in human beings?

Exercise | Q VIII. 5. | Page 190

Write a short note on probiotics.

Chapter 16: Microorganisms

Exercise
Class 8th Science Answers Guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 16 - Microorganisms

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 16 (Microorganisms) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 8th Science Answers Guide solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8th Science Answers Guide chapter 16 Microorganisms are Microorganisms (Microbes) and Microbiology, Protozoa, Virus, Microorganisms (Microbes) and Microbiology, Uses of Microorganisms (Microbes), Relationship Between Man and Microbes Balances, Imbalances and Uses, Algae, Bacteria, Virions, Fungi, Harmful Effects of Microorganisms (Microbes), Prions, Bacteria.

Using Tamil Nadu Board Samacheer Kalvi Class 8th solutions Microorganisms exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 8th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 16 Microorganisms Class 8th extra questions for Class 8th Science Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×