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A mother plant having 16 chromosomes produced ovules and underwent megasporogenesis, then the ploidy of the nucleus of A, B, C, D is:
Assertion [A]: The species that invade a bare area are pioneer species Reason [R]: In primary succession, lichens or Phytoplanktons invade rocks and water respectively
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Plants do not have respiratory organs due to the following reasonsI. Rate of respiration in plants is less than animals II. Loose packing of parenchyma cells III. Most cells of a plant have at least a part of their surface in contact with air IV. Transport of gases within the plant is more