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Define chemoautotrophs....

Define chemoautotrophs.

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Some organisms prepare their food by chemo- synthesis i.e., they use energy released during chemical reactions for synthesis of food. e.g., Nitrifying bacteria-Nitrosomonas, Sulphur bacteria- Thiobacillus, Iron bacteria-Ferrobacillus.
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Which of the following is the correct sequence of events in the origin of life? a. Reducing atmosphere. Br b. Origin of chemoautotrophs. Br c. Origin of genetic material. Br d. Origin of chemoheterotrophs.

Which of the following processes is fthe source of energy in chemoautotrophs for ixation of CO_2 into carbohydrates ?

Assertion (A) : The earliest organisms that appeared on the Earth were non-green and presumably anaerobis. Reason (R ) : The first autotrophic organisms were the chemoautotrophs that never released oxygen.

An example of chemoautotrophic bacteriaum is

Where from do the chemoautotrophs derive energy for the synthesis of their food?

$ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoautotrophs and anaerobes.

What are chemoautotrophs?

GURUKUL PUBLICATION - MAHARASHTRA PREVIOUS YEAR PAPERS- MARCH 2018-SECTION-II
  1. Define chemoautotrophs.

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  2. ………..is used for desalination of brackish water.

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  3. Which of the following is mesodermal in origin ?

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  4. ………..is an exotic breed of cow

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  5. ………..maintains basic metabolic rate

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  6. Which of the following is an example of ZW-ZZ type of mechanism of sex...

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  7. Transfer of gene between populations that differ genetically from anot...

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  8. In the given diagram of vaccine manufacturing process 'A' is ........

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  9. Longer toes and long prehensile tail indicate which adaptation ?

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  10. What does 'IUCD' indicate ?

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  11. Name the valve between left atrium and left ventricle and give its sig...

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  12. Give the use of bovine growth hormone.

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  13. State any 'two' symptoms of Down's syndrome.

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  14. Mention any 'one' skeletal difference between ape and man.

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  15. Sketch and label structure of Antibody.

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  16. Name the causative organism of 'typhoid' and draw its diagram.

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  17. State the economic importance of 'lac cultur,e ',

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  18. All organisms produce more young ones'. Comment.

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  19. Describe 'agranulocytes' with the help of diagrams.

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  20. Define parasitism and give any 'two' types with suitable example of ea...

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  21. Describe the structure of chromosome with a suitable diagram.

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