Question

Does variations leads to speiciation?

Answer 1

Yes they need it for the first question

Answer 2

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sᴘᴇᴄɪᴀᴛɪᴏɴ ᴏᴄᴄᴜʀs ғʀᴏᴍ sᴛᴀɴᴅɪɴɢ ɢᴇɴᴇᴛɪᴄᴠᴀʀɪᴀᴛɪᴏɴ ᴡʜᴇɴ ʀᴇᴘʀᴏᴅᴜᴄᴛɪᴠᴇ ɪsᴏʟᴀᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ 2 ᴏʀ ᴍᴏʀᴇ ᴘᴏᴘᴜʟᴀᴛɪᴏɴs ᴇᴠᴏʟᴠᴇs ғʀᴏᴍ ᴀʟʟᴇʟᴇs ᴀʟʀᴇᴀᴅʏ ᴘʀᴇsᴇɴᴛ ᴡɪᴛʜɪɴ ᴛʜᴇ ᴄᴏᴍᴍᴏɴ ᴀɴᴄᴇsᴛʀᴀʟ ᴘᴏᴘᴜʟᴀᴛɪᴏɴ, ʀᴀᴛʜᴇʀ ᴛʜᴀɴ ғʀᴏᴍ ɴᴇᴡ ᴍᴜᴛᴀᴛɪᴏɴs.