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D introduces the topic of the avian respiratory system and the unique structure of bird lungs.
B follows by describing how the air sacs in birds allow unidirectional flow of air through the lungs, which builds on the previous information.
A explains the benefit of unidirectional flow, i.e., the air remains 'fresh' with higher oxygen content.
C contrasts this with the bidirectional airflow in mammals, providing a comparison to birds.
So, the correct sequence is DBAC.
In each of the questions given below, four words are given in bold. These four words may or may not be in their correct position. The sentence is then ...
In the question given below, four words are given in bold. These four words may or may not be in their correct position. The sentence is then followed ...
Which of the following phrases (I), (II), and (III) given below each sentence should replace the phrase printed in bold letters to make the sentence gra...
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In the question below, a sentence is given with four words highlighted in bold, followed by options that provide a replacement for each word. From the ...
Media among (A) in schools and digital fasting literacy (B) families are also combat (C) steps to important (D) the disorder.
...Direction : In each of the following questions a grammatically correct and meaningful sentence is given with four words given in bold in each. Which of...
Direction : In each of the following questions a grammatically correct and meaningful sentence is given with four words given in bold in each. Which of...
