Structure of Pollen Grains: Exine and Intine: Germpore: Development of Male Gametophyte in Plants

Pollen grains are uninucleated, spherical or oval in shape and have double layered structure. The outer membrane is called exine while inner membrane is called intine. Germpores are present in exine.

Botany Optional for UPSC

Pteridophytes – General Characters

Respiratory Quotient

Reproduction in Lichens

Rain Forest Ecosystem
Acid Rains

Auxin Plant Hormone

Reproduction in Mangrove

Mangrove General Characters

Vernalization

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Botany optional for CSM and IFoS Mains Conducted by Union Public Service Commission (UPSC)

Botany optional for UPPSC Mains Examination conducted by Uttar Pradesh Public Service Commission (UPPSC)

Botany optional for West Bengal Civil Services (WBCS) Mains examination conducted by West Bengal Public Service Commission (WBPSC)

Botany optional for BPSC Mains Examination Conducted by Bihar Public Service Commission (BPSC)

Botany optional for OPSC Mains Examination Conducted by Odisha Public Service Commission (OPSC)

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Botany optional for MPPSC State Forest Service Mains Examination Conducted by Madhya Pradesh Public Service Commission (MPPSC)

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11th and 12th Biology Subject Examinations

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