what does a mature pollen grain represent
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ᴘᴏʟʟᴇɴ ɢʀᴀɪɴ (ᴍᴀʟᴇ ɢᴀᴍᴇᴛᴏᴘʜʏᴛᴇ)
ᴘᴏʟʟᴇɴ ɢʀᴀɪɴ ɢᴇʀᴍɪɴᴀᴛᴇ ᴀɴᴅ ɢɪᴠᴇ ʀɪsᴇ ᴛᴏ ᴍᴀʟᴇ ɢᴀᴍᴇᴛᴏᴘʜʏᴛᴇ.
ᴛʜᴇsᴇ ᴀʀᴇ sᴘʜᴇʀɪᴄᴀʟ, ᴍᴇᴀsᴜʀɪɴɢ ᴀʙᴏᴜᴛ 25-50 ᴍɪᴄʀᴏᴍᴇᴛᴇʀs ɪɴ ᴅɪᴀᴍᴇᴛᴇʀ.
ᴘᴏʟʟᴇɴ ɢʀᴀɪɴs ᴀʀᴇ ᴡᴇʟʟ ᴘʀᴇsᴇʀᴠᴇᴅ ᴀs ғᴏssɪʟs ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ᴘʀᴇsᴇɴᴄᴇ ᴏғ sᴘᴏʀᴏᴘᴏʟʟᴇɴɪɴ, ᴀ ᴛᴏᴜɢʜ, ʀᴇsɪsᴛᴀɴᴛ ᴀɴᴅ sᴛᴀʙʟᴇ ᴍᴀᴛᴇʀɪᴀʟ.
ᴀ ᴘᴏʟʟᴇɴ ɢʀᴀɪɴ ʜᴀs ᴀ ᴛᴡᴏ-ʟᴀʏᴇʀᴇᴅ ᴡᴀʟʟ ɴᴀᴍᴇʟʏ, ᴇxɪɴᴇ ᴀɴᴅ ɪɴᴛɪɴᴇ.
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Answer:
When the pollen grain is mature it contains two cells, the vegetative cell and generative cell .
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