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In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Earth is the only planet known to have life.
Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.
Assertion (A): Earth is the only planet known to have life.
Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.
- a)Both A and R are true but R is not the correct explanation of A.
- b)Both A and R are true and R is the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
- e)Both A and R are false.
Correct answer is option 'A'. Can you explain this answer?
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In each of the questions given below, there are two statements labelle...
Presence of water is the chief originator and sustainer of life on the Earth.
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In each of the questions given below, there are two statements labelle...
Assertion (A): Earth is the only planet known to have life.
Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen, and carbon dioxide.
The correct answer is option 'A', which states that both A and R are true, but R is not the correct explanation of A. Let's break down the given statements and understand why this answer is correct.
Understanding the Assertion (A)
The assertion states that Earth is the only planet known to have life. This statement is widely accepted and supported by scientific evidence. Earth is teeming with a diverse range of life forms, from microscopic bacteria to large mammals.
Understanding the Reason (R)
The reason provided states that Earth has no atmosphere which is a mixture of oxygen, nitrogen, and carbon dioxide. This reason is incorrect. In reality, Earth does have an atmosphere that consists of a mixture of gases, including oxygen, nitrogen, carbon dioxide, and other trace gases.
Explanation of the Correct Answer
The reason provided in statement (R) is incorrect because it contradicts established scientific knowledge. Earth does have an atmosphere that supports life. The atmosphere plays a crucial role in sustaining life on our planet by providing the necessary gases for respiration, regulating temperature, protecting against harmful radiation, and facilitating the water cycle.
While it is true that Earth's atmosphere is mostly composed of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of carbon dioxide, this does not mean that other planets cannot support life. The presence of these gases alone does not determine the existence of life. There are various factors such as distance from the sun, presence of liquid water, and geological activity that also contribute to the possibility of life on a planet.
Therefore, statement (A) is true because Earth is indeed the only planet known to have life, but statement (R) is false because Earth does have an atmosphere that is a mixture of gases, including oxygen, nitrogen, and carbon dioxide.
In conclusion, the correct answer is option 'A' because both the assertion and reason are true, but the reason does not correctly explain the assertion.
Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen, and carbon dioxide.
The correct answer is option 'A', which states that both A and R are true, but R is not the correct explanation of A. Let's break down the given statements and understand why this answer is correct.
Understanding the Assertion (A)
The assertion states that Earth is the only planet known to have life. This statement is widely accepted and supported by scientific evidence. Earth is teeming with a diverse range of life forms, from microscopic bacteria to large mammals.
Understanding the Reason (R)
The reason provided states that Earth has no atmosphere which is a mixture of oxygen, nitrogen, and carbon dioxide. This reason is incorrect. In reality, Earth does have an atmosphere that consists of a mixture of gases, including oxygen, nitrogen, carbon dioxide, and other trace gases.
Explanation of the Correct Answer
The reason provided in statement (R) is incorrect because it contradicts established scientific knowledge. Earth does have an atmosphere that supports life. The atmosphere plays a crucial role in sustaining life on our planet by providing the necessary gases for respiration, regulating temperature, protecting against harmful radiation, and facilitating the water cycle.
While it is true that Earth's atmosphere is mostly composed of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of carbon dioxide, this does not mean that other planets cannot support life. The presence of these gases alone does not determine the existence of life. There are various factors such as distance from the sun, presence of liquid water, and geological activity that also contribute to the possibility of life on a planet.
Therefore, statement (A) is true because Earth is indeed the only planet known to have life, but statement (R) is false because Earth does have an atmosphere that is a mixture of gases, including oxygen, nitrogen, and carbon dioxide.
In conclusion, the correct answer is option 'A' because both the assertion and reason are true, but the reason does not correctly explain the assertion.
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In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer?
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In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer?.
In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer?.
Solutions for In each of the questions given below, there are two statements labelled as Assertion (A) and Reason (R).Assertion (A): Earth is the only planet known to have life.Reason (R): Earth has no atmosphere which is a mixture of oxygen, nitrogen and carbon dioxide.a)Both A and R are true but R is not the correct explanation of A.b)Both A and R are true and R is the correct explanation of A.c)A is true but R is false.d)A is false but R is true.e)Both A and R are false.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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