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#Question id: 4935


Which gas was least abundant in Earthʹs early atmosphere, prior to 2 billion years ago?

#11. Evolution and Behavior
  1. O2

  2. CO2

  3. CH4

  4. H2O


Answer:- Option(s): 1


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#Question id: 3857

#3. Fundamental Processes

The CAAT box is usually located near the position:

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#Question id: 550

#1. Molecules and their Interaction Relevant to Biology

Which of the following statements is false?

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#Question id: 9269

#6. System Physiology – Plant

The distribution of electrons in the excited molecule is somewhat different from the distribution in the groundstate molecule, Absorption of blue light excites the chlorophyll to a higher energy state than absorption of red light because

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#Question id: 11097

#7. System Physiology – Animal

The volume of air in the lungs following a complete exhalation of the expiratory reserve volume is

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#Question id: 11744

#6. System Physiology – Plant

Large pores in cell walls are the prominent feature of sieve elements, the sieve area pores range in diameter from

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