Question

What are the exception of phylum mammalian in biology?

Answer 1

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ᴍᴀᴍᴍᴀʟs ᴀʀᴇ ᴛʜᴇ ᴠᴇʀᴛᴇʙʀᴀᴛᴇs ᴡɪᴛʜɪɴ ᴛʜᴇ ᴄʟᴀssᴍᴀᴍᴍᴀʟɪᴀ (/ᴍəˈᴍᴇɪʟɪə/ ғʀᴏᴍ ʟᴀᴛɪɴ ᴍᴀᴍᴍᴀ "ʙʀᴇᴀsᴛ"), ᴀ ᴄʟᴀᴅᴇ ᴏғ ᴇɴᴅᴏᴛʜᴇʀᴍɪᴄ ᴀᴍɴɪᴏᴛᴇs ᴅɪsᴛɪɴɢᴜɪsʜᴇᴅ ғʀᴏᴍ ʀᴇᴘᴛɪʟᴇs (ɪɴᴄʟᴜᴅɪɴɢ ʙɪʀᴅs) ʙʏ ᴛʜᴇ ᴘᴏssᴇssɪᴏɴ ᴏғ ᴀ ɴᴇᴏᴄᴏʀᴛᴇx (ᴀ ʀᴇɢɪᴏɴ ᴏғ ᴛʜᴇ ʙʀᴀɪɴ), ʜᴀɪʀ, ᴛʜʀᴇᴇ ᴍɪᴅᴅʟᴇ ᴇᴀʀ ʙᴏɴᴇs, ᴀɴᴅ ᴍᴀᴍᴍᴀʀʏ ɢʟᴀɴᴅs. ғᴇᴍᴀʟᴇs ᴏғ ᴀʟʟ ᴍᴀᴍᴍᴀʟ sᴘᴇᴄɪᴇs ɴᴜʀsᴇ ᴛʜᴇɪʀ ʏᴏᴜɴɢ ᴡɪᴛʜ ᴍɪʟᴋ, sᴇᴄʀᴇᴛᴇᴅ ғʀᴏᴍ ᴛʜᴇ ᴍᴀᴍᴍᴀʀʏ ɢʟᴀɴᴅs.

Answer 2

1. mammals are found in a variety of habitats polar ice caps, deserts, mountain, forest ,grasslands .
2. The most unique mammalian characteristic is the presence of mammary glands.
3. They have two pairs of limbs.
4. The skin of mammals is unique in possessing hair .
5. External ears or pinna are present.
6. Respiration is by lungs.