Question
Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements.
Statements: (A) Wings of butterflies and birds look alike and are the results of (i), evolution. (B) Miller showed that CH4, H2, NH3, and (i), when exposed to electric discharge in a flask resulted in the formation of (ii). (C) Vermiform appendix is a (i) organ and an (ii)____ evidence of evolution. (D) According to Darwin evolution took place due to (i)____ and (ii)____ of the fittest.
(A) - (i) convergent, (B) - (ii) oxygen, (ii) nucleosides
(B) - (i) water vapour, (ii) amino acids, (C) - (i) rudimentary (ii) anatomical
(C) - (i) vestigial, (ii) anatomical, (D) - (i) mutations, (ii) multiplication
(D) - (i) small variations, (ii) survival, (A) - (i) convergent
Statement (A) refers to convergent evolution, as the wings of butterflies and birds are analogous structures (similar function, different origin) . Statement (B) refers to Miller's experiment which used water vapour and observed the formation of amino acids . Statement (C) refers to the vermiform appendix, which is a vestigial organ (anatomical evidence). Statement (D) refers to Darwin's theory, which emphasized small variations (heritable) and survival of the fittest (natural selection), contrasting with de Vries' mutation theory , . Option 4 correctly fills the blanks for statements D and A.
This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Evolution. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.
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