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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

What Do We Call the Degenerated Or Partially Developed Useless Organs in Living Organisms? Enlist Such Organs in Human Body? How the Same Organs Are Useful in Other Animals? - Science and Technology 2

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प्रश्न

What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?

टीपा लिहा

उत्तर

- Degenerated or partially developed useless organs are called vestigial organs.
- Wisdom tooth, Appendix, Body hairs, Coccyx, are some vestigial organs in human body.
- Coccyx supports the tail in other animals. Body hairs protect from cold.

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2018-2019 (March) Balbharati Model Question Paper Set 1

संबंधित प्रश्‍न

With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.


How analogy and homology considered as an evidence in support of evolution ?


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


Give the importance of fossil in support of organic evolution


Name the scientists who Discovered the fossil of Australopithecus


The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?

 

The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic organs


In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard


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.


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


What do you mean by vestigial structures? Name four vestigial organs found in man.


Choose the correct option of the following question:

Wings of Insect and Birds are examples of :


Define fossil.


Explain the importance of Anatomical evidences with examples.


Name the parts shown in the diagram.
Human jaw


The decaying process of C-14 occurs continuously in dead organisms only.


Give scientific reason.

Vertebrates have slowly originated from invertebrates.


Write a short note:

Embryological evidences


The degenerated and non-functional organs found in an organism are called ______.


How do you differentiate homologous organs from analogous organs?


Select vestigial organs from the following.


Select the correct statement.


Why do all the gametes formed in human females have an X chromosome?


Tendons and ligaments are examples of ______.


Palaeontological evidence for evolution refers to the ______.


Flippers of Penguins and Dolphins are examples of: 


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


Animal husbandry and plant breeding programmes are the examples of ______.


Fossils are generally found in ______.


How do we compute the age of a living tree?


How do we compute the age of a rock?


As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.

These are known as ______. Give example.


Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?


Give a definition of Palaeontology.


Write names of some vestigial organs in the human body.


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