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If You Are Asked to Select a Group of Two Vegetables, Out of the Following, Having Homologous Structures Which One Would You Select? - Science

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प्रश्न

If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?

(a) Carrot and radish

(b) Potato and sweet potato

(c) Potato and tomato

(d) Lady finger and potato

उत्तर

Homologous structures are fundamentally same in structure and origin but are modified to perform different functions in different organisms. They indicate common ancestry. From the given plants, carrot and radish are homologous structures because they both are underground roots. While potato is a stem, sweet potato is a root, tomato is a fruit and lady finger is a vegetable

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2015-2016 (March) All India Set 3

संबंधित प्रश्‍न

Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution? 


Four students A, B, C and D reported the following set of organs to be homologous. Who is correct ?

(A) Wings of a bat and a butterfly

(B) Wings of a pigeon and a bat

(C) Wings of a pigeon and a butterfly

(D) Forelimbs of cow, a duck and a lizard


How do homologous organs help in providing evidence for organic evolution?


Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs


There are five animals A, B, C, D and E. The animal A uses its modified forelimbs for flying. The animal B uses its forelimbs for running whereas the animal C uses its forelimbs for grasping. The animal D can live on land as well as in water and uses its forelimbs to prop up the front end of its body when at rest. The animal E which respires by using spiracles and tracheae uses wings for flying but its wings are analogous to the modified forelimbs of animal A.
(a) What could the animals A, B, C, D and E be?
(b) Why are the forelimbs of animals A, B, C, D called homologous organs?
(c) What does the existence of homologous organs in animals A, B, C and D tell us about their ancestors ?
(d) Why are the modified forelimbs of animal A and the wings of animal E called analogous organs?
(e) State whether animals A and E have a common ancestor or not.


Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................


Complete the flowchart.


Observe the following images and answer the questions.

  1. Which evolutionary evidences are indicated in the given picture?
  2. How are they formed?
  3. Which method is used to measure their age or their time?

Basic principles of embryonic development were pronounced by:


Complete the following diagram:


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