AIIMS 2018 Botany Gas Exchange Assertion Reason Question
Assertion: Hybrid is formed by cross between two organisms that are different in one, or more than one traits
Reason: Mendel crossed two plants differing in one trait to obtain F1 plants which is monohybrid cross
Both assertion and reason are true, and reason is the correct explanation for assertion.
Both assertion and reason are true, but reason is not the correct explanation for assertion.
Assertion is true, but reason is false.
Both assertion and reason are false.
Correct Answer
Detailed Explanation
Option A is correct because the assertion accurately describes the diffusion of O₂ from the alveoli to tissues and CO₂ from tissues to the alveoli, which occurs due to the concentration gradient and the thinness of the alveolar walls. The reason is also true, as alveolar walls are indeed one cell thick, facilitating efficient gas exchange; thus, it correctly explains the assertion.
Option B is incorrect because the reason is a valid explanation for the assertion. Option C is wrong since both statements are true, and option D is incorrect as both the assertion and reason are factual. Understanding the structure of alveoli and the principles of gas exchange is crucial for grasping respiratory physiology.
Found an issue with this question?
Related Questions
More from Respiratory System
More from 2018
Which one is a WRONG statement? (A) Total orbital angular momentum of electron in 's' orbital is equal to zero. (B) An orbital is designated by thre...
Each of these questions contains two statements. Assertion and Reason. Each of these questions also has four alternative choices, only one of which is...