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______ is a vestigial organ in human beings. - Science and Technology 2

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प्रश्न

______ is a vestigial organ in human beings.

विकल्प

  • Wisdom teeth

  • Ear muscles

  • Body hairs

  • All the above

MCQ
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उत्तर

All the above

Explanation:

All the given options are vestigial organs/structures in human beings:

  • Wisdom teeth – no longer needed for chewing tough food.
  • Ear muscles – humans cannot move their ears like some animals.
  • Body hairs – reduced in function compared to early humans.
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अध्याय 1: Heredity and Evolution - Choose the correct option

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एससीईआरटी महाराष्ट्र Science and Technology 2 [English] 10 Standard SSC
अध्याय 1 Heredity and Evolution
Choose the correct option | Q 3

संबंधित प्रश्न

State the connecting links between Peripatus with Annelida and Arthopoda.


Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.

(i) Forelimbs of cheetah and mammals

(ii) Flippers of dolphins and penguins

(iii) Wings of butterflies and birds

(iv) Forelimbs of whales and mammals


Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.


Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :

Fossils


Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.


What are homologous organs?


Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.


Some dinosaurs had feathers although they could not fly birds have feathers that help them to fly. In the context of evolution, this means that ______


The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive organs


The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs


One pair of organs in the following animals are not homologous. This is :
(a) forelimbs in humans and lizard
(b) forelimbs in lizard and frog
(c) wings in butterfly and bat
(d) wings in bat and bird


X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct an long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X → Z → Y or Y → Z → X?


You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.

(A) Potato and tomato

(B) Carrot and tomato

(C) Potato and sweet potato

(D) Carrot and radish


Read the following statement and justify same in your own words with the help of suitable example.

There is evidences of fatal science among chordates.


Explain with suitable examples importance of anatomical evidence in evolution. 


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


Complete the following chart:


Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy. 


Very short answer question:

What is vestigeal organ?


Find an odd one out.


Name the parts shown in the diagram.
Human jaw


Appendix : vestigial organ : : Peripatus : ____________


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?

Write the answers to the questions by observing the figure below.

(a) (b) (c)
  1. Write the name of the animal ‘(a)’ in the figure.
  2. Write the name of the animal ‘(b)’ in the figure.
  3. Write the name of the animal ‘(c)’ in the figure.
  4. Which evolutionary evidence is illustrated by this figure?
  5. Write the definition of that evidence for evolution.

Biogenetic law states that ______.


Select the CORRECT set of homologous organs.


Tendons and ligaments are examples of ______.


The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.


Which of the following is used as an atmospheric pollution indicator?


Did aquatic life forms get fossilised? If, yes where do we come across such fossils?


What are we referring to? When we say 'simple organisms' or 'complex organisms'.


Give an example for convergent evolution and identify the features towards which they are converging.


The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.


Complete the following diagram:


Write a note on the significance of Palaeontology.


Write names of some vestigial organs in the human body.


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