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Question
Study the different conclusions drawn by students of a class on the basis of observations of preserved/available specimens of plants and animals.
I. Potato and sweet potato are analogous organs in plants.
II. Wings of insects and wings of birds are homologous organs in animals.
III. Wings of insects and wings of bats are analogous organs in animals.
IV. Thorns of citrus and tendrils of cucurbita are analogous organs in plants.
The correct conclusions are:
(A) I, and II
(B) II and IV
(C) I and III
(D) III and IV
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Solution
(C)
Analogous organs are those which do not share a common ancestry but perform common function.
Hence, wings of insects and wings of bats are analogous organs in animals.
Hence, Potato and sweet potato are analogous organs in plants.
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RELATED QUESTIONS
Classify the following carbon compounds into two homologous series and name them.
C3H4, C3H6, C4H6, C4H8, C5H8, C5H10
Write the name and formula of the 2nd member of homologous series having general formula CnH2n + 2.
Write the molecular formula of the 2nd and 3rd member of the homologous series where the first member is ethyne.
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(c) C5H10O
(d) C6H12O
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There are different general molecular formula for all members of the homologous series.
Complete the following chart by using examples given in brackets.
(isobutylene, cyclohexane, propane, cyclohexene, cyclopentane, benzene, propyne, isobutane, propene)
| Straight chain hydrocarbons | Branched chain hydrocarbons | Cyclic hydrocarbons |
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