NEET 2010 Biology 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 : (A) Wings of butterfly and birds look alike and are the results of ..... (i)....., evolution (B) Miller showed that CH, H, NH and .... (i) ..., when exposed to electric discharge in a flask resulted in 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. Options :
Solution
(A) Wings of butterflies (insect) and birds (vertebrate) are analogous organs: similar function, different origin, produced by convergent evolution. (B) In the Miller-Urey experiment CH, H, NH and water vapour were exposed to electric discharge at 800 C and amino acids were formed. (C) The
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