Question

BSc zoology obelia notes plzz its very urgent.........

Answer 1

=============================
╚»ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ «╝
=============================

❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀
❀ [1] Introduction to Obelia:-
❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀

✧ᴏʙᴇʟɪᴀ ɪs ᴀ ᴛʏᴘɪᴄᴀʟ ᴇxᴀᴍᴘʟᴇ ᴏғ ᴀ ᴍᴀʀɪɴᴇ, ᴄᴏʟᴏɴɪᴀʟ ʜʏᴅʀᴏᴢᴏᴀɴ. ʟɪᴋᴇ ᴍᴏsᴛ ʜʏᴅʀᴏᴢᴏᴀɴs ɪᴛ ʜᴀs ʙᴏᴛʜ ᴘᴏʟʏᴘ ᴀɴᴅ ᴍᴇᴅᴜsᴀ sᴛᴀɢᴇs. ᴏʙᴇʟɪᴀ ᴏᴄᴄᴜʀs ᴀs ᴀ ᴅᴇʟɪᴄᴀᴛᴇ ᴡʜɪᴛɪsʜ ᴏʀ ʟɪɢʜᴛ ʙʀᴏᴡɴ, ᴀʟᴍᴏsᴛ ғᴜʀ-ʟɪᴋᴇ ɢʀᴏᴡᴛʜ ᴏɴ sᴇᴀᴡᴇᴇᴅs ᴏʀ ᴛɪᴍʙᴇʀ. ɪᴛ ᴄᴏɴsɪsᴛs ᴏғ ʙʀᴀɴᴄʜᴇᴅ ғɪʟᴀᴍᴇɴᴛs ᴀᴘᴘʀᴏxɪ­ᴍᴀᴛᴇʟʏ ᴛʜᴇ ᴛʜɪᴄᴋɴᴇss ᴏғ ғɪɴᴇ sᴇᴡɪɴɢ ᴄᴏᴛᴛᴏɴ. ᴀ ᴄᴏᴍᴍᴏɴ ᴇxᴀᴍᴘʟᴇ ᴏғ ɪᴛ ɪs ᴏʙᴇʟɪᴀ ɢᴇɴɪᴄᴜʟᴀᴛᴀ.

❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀
❀ [2] Habit and Habitat:-
❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀

✧ᴏʙᴇʟɪᴀ ɪs ᴛʏᴘɪᴄᴀʟʟʏ ᴍᴀʀɪɴᴇ, ᴄᴏʟᴏɴɪᴀʟ ᴀɴᴅ sᴇᴅᴇɴᴛᴀʀʏ, ʜᴀᴠɪɴɢ ᴄᴏsᴍᴏᴘᴏʟɪᴛᴀɴ ᴅɪsᴛʀɪʙᴜᴛɪᴏɴ. ɪᴛ ɪs ғᴏᴜɴᴅ ᴜᴘ ᴛᴏ ᴀ ᴅᴇᴘᴛʜ ᴏғ 80 ᴍᴇᴛʀᴇs. ɪᴛ ᴇxɪsᴛs ɪɴ ᴛᴡᴏ ᴘʀɪɴᴄɪᴘᴀʟ ғᴏʀᴍ—ᴛʜᴇ ᴘᴏʟʏᴘ ᴀɴᴅ ᴛʜᴇ ᴍᴇᴅᴜsᴀ. ᴛʜᴇ ᴘᴏʟʏᴘ ʀᴇᴘʀᴇsᴇɴᴛs ᴛʜᴇ ᴀsᴇxᴜᴀʟ ᴘʜᴀsᴇ ᴡʜɪᴄʜ ɪs ᴀ ᴘʀᴏᴍɪɴᴇɴᴛ ʙʀᴀɴᴄʜᴇᴅ ʜʏᴅʀᴏɪᴅ ᴄᴏʟᴏɴʏ ғᴏᴜɴᴅ ᴀᴛᴛᴀᴄʜᴇᴅ ᴛᴏ ʀᴏᴄᴋs, sᴛᴏɴᴇs, sʜᴇʟʟs ᴏғ ᴀɴɪᴍᴀʟs, ᴡᴏᴏᴅᴇɴ ᴘɪʟɪɴɢs ᴇᴛᴄ.

✧ᴛʜᴇ ᴍᴇᴅᴜsᴀ, ᴏɴ ᴛʜᴇ ᴏᴛʜᴇʀ ʜᴀɴᴅ, ʀᴇᴘʀᴇsᴇɴᴛs ᴛʜᴇ sᴇxᴜᴀʟ ᴘʜᴀsᴇ. ᴛʜᴇʀᴇ ɪs ᴀɴ ᴀʟᴛᴇʀɴᴀᴛɪᴏɴ ᴏғ ᴛʜᴇsᴇ ᴛᴡᴏ ᴘʜᴀsᴇs ɪɴ ɪᴛs ʟɪғᴇ-ᴄʏᴄʟᴇ, ᴡʜɪᴄʜ ɪs ᴀ ᴛʏᴘɪᴄᴀʟ ɪɴsᴛᴀɴᴄᴇ ᴏғ ᴍᴇᴛᴀɢᴇɴᴇsɪs.

❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀
❀ [3] Respiration, Circulation and
❀ Excretion in Obelia:-
❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀

✧Tʜᴇʀᴇ ᴀʀᴇ ɴᴏ ʀᴇꜱᴘɪʀᴀᴛᴏʀʏ, ᴄɪʀᴄᴜʟᴀᴛᴏʀʏ ᴀɴᴅ ᴇxᴄʀᴇᴛᴏʀʏ ᴏʀɢᴀɴꜱ. Oxʏɢᴇɴ ғʀᴏᴍ ᴛʜᴇ ꜱᴜʀʀᴏᴜɴ­ᴅɪɴɢ ᴡᴀᴛᴇʀ ᴅɪғғᴜꜱᴇꜱ ᴅɪʀᴇᴄᴛʟʏ ɪɴᴛᴏ ᴛʜᴇ ᴄᴇʟʟꜱ. Cᴀʀʙᴏɴ ᴅɪᴏxɪᴅᴇ ᴀɴᴅ ɴɪᴛʀᴏɢᴇɴᴏᴜꜱ ᴇxᴄʀᴇᴛᴏʀʏ ᴘʀᴏᴅᴜᴄᴛꜱ ᴅɪғғᴜꜱᴇ ᴏᴜᴛ ᴏғ ᴛʜᴇ ᴄᴇʟʟꜱ ᴀɴᴅ ᴄᴀʀʀɪᴇᴅ ᴏᴜᴛ ᴏғ ᴛʜᴇ ʙᴏᴅʏ ʙʏ ᴛʜᴇ ᴄɪʀᴄᴜʟᴀᴛɪɴɢ ᴡᴀᴛᴇʀ.

❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀
❀ [4] Nutrition in Obelia:-
❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀❀

✧ɢᴀsᴛʀᴏ-ᴢᴏᴏɪᴅ ᴏʀ ɴᴜᴛʀɪᴛɪᴠᴇ ᴢᴏᴏɪᴅ ɪs ᴛʜᴇ ғᴇᴇᴅ­ɪɴɢ ᴢᴏᴏɪᴅ ᴏғ ᴛʜᴇ ᴏʙᴇʟɪᴀ ᴄᴏʟᴏɴʏ. ᴛʜɪs ᴢᴏᴏɪᴅ ᴀɴᴅ ᴍᴇᴅᴜsᴀ ᴀʀᴇ ᴄᴀʀɴɪᴠᴏʀᴏᴜs, ғᴇᴇᴅɪɴɢ ᴜᴘᴏɴ sᴍᴀʟʟ ᴀǫᴜᴀᴛɪᴄ ᴄʀᴜsᴛᴀᴄᴇᴀɴs, ɴᴇᴍᴀᴛᴏᴅᴇs ᴀɴᴅ ᴏᴛʜᴇʀ ᴡᴏʀᴍs. ᴛʜᴇɪʀ ᴛᴇɴᴛᴀᴄʟᴇs ᴀʀᴇ ᴀʀᴍᴇᴅ ᴡɪᴛʜ ɴᴇᴍᴀ­ᴛᴏᴄʏsᴛs, ᴡʜɪᴄʜ ᴘᴀʀᴀʟʏᴢᴇ ᴀɴᴅ ᴄᴀᴘᴛᴜʀᴇ ᴛʜᴇ ᴘʀᴇʏ, ᴡʜɪᴄʜ ɪs ᴛʜᴇɴ ᴄᴏɴᴠᴇʏᴇᴅ ᴛᴏ ᴛʜᴇ ᴍᴏᴜᴛʜ.

✧ᴅɪɢᴇs­ᴛɪᴠᴇ ᴊᴜɪᴄᴇs sᴇᴄʀᴇᴛᴇᴅ ʙʏ ɢʟᴀɴᴅ ᴄᴇʟʟs, ᴛʜᴇɴ ᴀᴄᴛ ᴜᴘᴏɴ ᴛʜᴇ ғᴏᴏᴅ ᴀɴᴅ ʙʀɪɴɢ ᴀʙᴏᴜᴛ ᴘᴀʀᴛɪᴀʟ ᴇxᴛʀᴀ­ᴄᴇʟʟᴜʟᴀʀ ᴅɪɢᴇsᴛɪᴏɴ ɪɴ ᴛʜᴇ ɢᴀsᴛʀᴏ-ᴠᴀsᴄᴜʟᴀʀ ᴄᴀᴠɪᴛʏ. ᴛʜɪs ᴘᴀʀᴛɪᴀʟʟʏ ᴅɪɢᴇsᴛᴇᴅ ғᴏᴏᴅ ɪs ᴛʜᴇɴ ᴄɪʀᴄᴜʟᴀᴛᴇᴅ ᴛʜʀᴏᴜɢʜ ɢᴀsᴛʀᴏ-ᴠᴀsᴄᴜʟᴀʀ ᴄᴀᴠɪᴛʏ ᴏғ ᴛʜᴇ ᴇɴᴛɪʀᴇ ᴄᴏʟᴏɴʏ ʙʏ ᴛʜᴇ ʙᴇᴀᴛɪɴɢ ᴏғ ғʟᴀɢᴇʟʟᴀ ᴏғ ᴇɴᴅᴏᴅᴇʀᴍ.

✧ᴇɴᴅᴏᴅᴇʀᴍᴀʟ ᴄᴇʟʟs ᴡɪᴛʜ ᴛʜᴇɪʀ ᴘsᴇᴜᴅᴏᴘᴏᴅɪᴀ ᴘʀᴏᴄᴇssᴇs ᴇɴɢᴜʟғ sᴍᴀʟʟ ᴘɪᴇᴄᴇs ᴏғ ᴛʜɪs ғᴏᴏᴅ ᴀɴᴅ ᴅɪɢᴇsᴛ ᴛʜᴇᴍ ɪɴᴛʀᴀᴄᴇʟʟᴜʟᴀʀʟʏ. ᴜɴᴅɪɢᴇsᴛᴇᴅ ғᴏᴏᴅ ɪs ᴛʜᴇɴ ᴇɢᴇsᴛᴇᴅ ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴍᴏɴᴛʜ.