With reference to microorganisms, consider the following statements: 1. They are classified into four major groups: bacteria, fungi, protozoa, and algae. 2. They can survive only in moderate climates and die in ice-cold or hot spring environments. 3. Some microorganisms are unicellular, while others are multicellular. Which of the statements given above is/are correct?

Correct Option The correct option is (c). Explanation Microorganisms are microscopic organisms that may be single-celled or multicellular. They exhibit immense diversity in terms of structure, classification, and habitat adaptability. Statement-wise Analysis - Statement 1 is Correct: Microorganisms are broadly classified into four major groups: bacteria, fungi, protozoa, and algae. While viruses are also microscopic, they are distinct because they reproduce only inside the cells of the host organism. - Statement 2 is Incorrect: Microorganisms are not restricted to moderate climates. They can survive in all types of environments, ranging from ice-cold climates to hot springs (thermophiles), and from deserts to marshy lands. They are also found inside the bodies of animals, including humans. - Statement 3 is Correct: Microorganisms exhibit varied cellular organization. Some are unicellular (e.g., bacteria, some algae like Chlamydomonas, and protozoa like Amoeba), while others are multicellular (e.g., many algae like Spirogyra and fungi like bread mould and Aspergillus). Key Takeaway Microbial Diversity: Microorganisms are omnipresent, capable of surviving in extreme environments (extremophiles), and range from unicellular organisms (bacteria, protozoa) to multicellular ones (algae, fungi).

With reference to microorganisms, consider… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 2: Microorganisms : friend and foe

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With reference to microorganisms, consider the following statements:

They are classified into four major groups: bacteria, fungi, protozoa, and algae.
They can survive only in moderate climates and die in ice-cold or hot spring environments.
Some microorganisms are unicellular, while others are multicellular.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 1

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c).

Explanation

Microorganisms are microscopic organisms that may be single-celled or multicellular. They exhibit immense diversity in terms of structure, classification, and habitat adaptability.

Statement-wise Analysis

Statement 1 is Correct: Microorganisms are broadly classified into four major groups: bacteria, fungi, protozoa, and algae. While viruses are also microscopic, they are distinct because they reproduce only inside the cells of the host organism.
Statement 2 is Incorrect: Microorganisms are not restricted to moderate climates. They can survive in all types of environments, ranging from ice-cold climates to hot springs (thermophiles), and from deserts to marshy lands. They are also found inside the bodies of animals, including humans.
Statement 3 is Correct: Microorganisms exhibit varied cellular organization. Some are unicellular (e.g., bacteria, some algae like Chlamydomonas, and protozoa like Amoeba), while others are multicellular (e.g., many algae like Spirogyra and fungi like bread mould and Aspergillus).

Key Takeaway

Microbial Diversity: Microorganisms are omnipresent, capable of surviving in extreme environments (extremophiles), and range from unicellular organisms (bacteria, protozoa) to multicellular ones (algae, fungi).

Your note

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