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#Question id: 4961


An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to

#11. Evolution and Behavior
  1. make life on land difficult for aerobic organisms.

  2. change the atmosphere from oxidizing to reducing.

  3. make it easier to maintain reduced molecules

  4. cause iron in ocean water and terrestrial rocks to rust (oxidize).


Answer:- Option(s): 4


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#Question id: 10253

#6. System Physiology – Plant

Two pathways for the splitting of sucrose are known in plants, both of which take part in the use of sucrose from phloem unloading;

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#Question id: 3879

#3. Fundamental Processes

Which of the following is not usually essential for the catalytic activity of ribozymes?

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#Question id: 3542

#8. Inheritance Biology

All genes are not linked. The probability of a progeny being AaBBccDd from a corss between AABbccDd and aaBBccDD parents will be

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#Question id: 5556

#5. Developmental Biology

Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.

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#Question id: 4171

#3. Fundamental Processes

Use the table below to determine which template strand DNA sequence (written in the 5ʹ → 3ʹm direction) specifies the tripeptide with the sequence gly-ala-leu.

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