Exercise. 10th. Part 2. - 1. Heredity and Evolution.

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आठवी, नववी व दहावी विज्ञान विषयाच्या अभ्यासासाठी खालील लिंकला स्पर्श करावा. 

माहिती विज्ञानाची 🎷

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वर्षानुवर्षे केवळ धड्याखालील स्वाध्याय लिखाण करणे यातून विद्यार्थ्यांमध्ये एक मरगळ आलेली आहे, तो दूर करण्यासाठी हा अल्प प्रयत्न आहे.

ज्या प्रश्नाचे उत्तर आले नसेल तेवढा भाग सोडून पुढील प्रश्न विद्यार्थ्यांनी सोडवावेत.

पहिला धडा हा खूप आव्हानात्मक आहे. 

या धड्याचा स्वाध्याय सोडवताना विद्यार्थ्यांची बौद्धिक कसोटी पाहिली जाणार आहे.

गाईड, इन माय पॉकेट, कोहिनूर हे एक वाचन साहित्य म्हणून ठीक आहे, पण आपल्याला धडा समजला की नाही हे खालील स्वाध्याय वरुन समजणार आहे.

धड्याचा संपूर्ण अभ्यास झाल्यावर हा स्वाध्याय विद्यार्थ्यांनी सोडवला तर त्यांना आनंद वाटेल.

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1. Are our wisdom teeth really useful for chewing the food?
2. ....... is connecting link between annelida and arthropoda.
3. What is mean by ‘translocation’.
4. ....... consumption of animals and plants stops after death.
5. The living orgaism can transfer the characters which it has aquired, to the next generation. This is called ancestry of ……. characters.
6. About 15 lakh years ago, human walking with ..... posture was evolved.
7. ..... proposed that the activities of the organisms are responsible for their evolution.
8. Carbon dating method is based upon the radioactive decay of naturally occurring C-14 and it is developed by Willard Libby.
9. Degenerated or underdeveloped useless organs of organisms are called as ..... organs.
10. Why are many species of animals and birds getting extinct?
11. Which are the components the DNA molecule?
12. What is mean by ‘triplet codon’.
13. Write any four Evidences of evolution.
14. Defination of evolution.
15.  ...... fish performs respiration with lungs irrespective of being fish. 
16. . .... is the group of organisms that can produce fertile individuals through natural reproduction.
17.   ...... man can be considered as the first example of wise-man.
18. Art of ..... was invented about 5000 years ago and thus the history had been started.
19. Charles Robert Darwin an English biologist proposed the theory of …….  .
20. What is mean by ‘mutation’.
21. Which component of the cellular nucleus of living organisms carries hereditary characters.
22. According to theory Theory of Evolution , first living material (protoplasm) has been formed in ..........  .
23. Appendix, which is useless to human, is useful and fully functional organ in ruminants.
24. Duck billed platypus lays eggs like r..... but shows relationship with mammals too due to presence of mammary glands and hairs.
25. About 10 thousand years ago, wise-man started to practice the ......  .
26. ......... is the transfer of biological characters from one generation to another via genes.
27. First human--like animals with erect posture which were using their hands have evolved about ..... crore years ago.
28. What is mean by ‘Central Dogma’.
29. Geographical or reproductive isolation also leads to ..... . 
30.  Darwin had published a book titled ‘............’.
31. In 1902, Walter and Sutton observed the paired chromosomes in the cells of ........  .
32. Which are the different organs in body of organisms? 
33. First record of human-like animal is with us in the form of ‘.......’ ape from East Africa.
34. Explain the meaning of genetic disorders and give names of some disorders.
35. All the evolutionary changes were slow and gradual. Duration of all these changes is at must ...... crore years.
36. What is mean by ‘translation’.
37.  Is each of the organs useful to organism?
38. ......... may cause the genetic disorders like sickle cell anemia.
39.  Remnants and impressions of such organisms remain preserved underground. These are called as .........  .
40. What is mean by ‘transcription’. 
41. What is the function of the appendix of our digestive system?
42. Write objections raised against the theory of natural selection.
43. What is mean by carbon dating.
44. What is mean by Lamarckism.
45.  Last dinosaurs disappeared approximately ...... crore years ago.
46. The ape of South Africa evolved about ...... lakh years ago.
47. Brain of .... thousand year old man had been sufficiently evolved to the extent that it could be considered as member of the class- wise-man (Homo sapiens).
48. Except ...... all living organisms have DNA as genetic material. 
49. Write down examples of Vestigial Organs.
50. Why did the huge animals like dinosaur become extinct?
51.  ....... is everlasting process of changes.
52. Progressive development of plants and animals from the ancestors having different structural and functional organization is called evolution.
53. Dr Har Govind Khorana, a scientist of Indian origin has made an important contribution in discovery of triplet codons for ...... amino acids.

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