Question

define external fertilization. mention it's disadvantage.​

Answer 1

ᴅᴇꜰɪɴɪᴛɪᴏɴ:-

------>. ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ ɪꜱ ᴀ ᴍᴏᴅᴇ ᴏꜰ ʀᴇᴩʀᴏᴅᴜᴄᴛɪᴏɴ ɪɴ ᴡʜɪᴄʜ ᴀ ᴍᴀʟᴇ ᴏʀɢᴀɴɪꜱᴍ'ꜱ ꜱᴩᴇʀᴍ ꜰᴇʀᴛɪʟɪᴢᴇꜱ ᴀ ꜰᴇᴍᴀʟᴇ ᴏʀɢᴀɴɪꜱᴍ'ꜱ ᴇɢɢ ᴏᴜᴛꜱɪᴅᴇ ᴏꜰ ᴛʜᴇ ꜰᴇᴍᴀʟᴇ'ꜱ ʙᴏᴅy.

ᴅɪꜱᴀᴅᴠᴀɴᴛᴀɢᴇꜱ ᴏꜰ ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ :-

------>. ɪɴ ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ, ᴇɢɢ ʜᴀꜱ ʟᴇꜱꜱ ᴄʜᴀɴᴄᴇ ᴏꜰ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ . ᴛʜɪꜱ ᴄᴀɴ ʟᴇᴀᴅ ᴛᴏ ᴛʜᴇ ᴡᴀꜱᴛᴀɢᴇ ᴏꜰ ᴀ ʟᴀʀɢᴇ ɴᴜᴍʙᴇʀ ᴏꜰ ᴇɢɢꜱ ᴩʀᴏᴅᴜᴄᴇᴅ ᴅᴜʀɪɴɢ ᴩʀᴏᴄᴇꜱꜱ. ꜰᴜʀᴛʜᴇʀ.ᴛʜᴇʀᴇ ɪꜱ ᴀɴ ᴀʙꜱᴇɴᴄᴇ ᴏꜰ ᴩʀᴏᴩᴇʀ ᴩᴀʀᴇɴᴛᴀʟ ᴄᴀʀᴇ ᴛᴏ ᴛʜᴇ ᴏꜰꜰꜱᴩʀɪɴɢ , ᴡʜɪᴄʜ ʀᴇꜱᴜʟᴛꜱ ɪɴ ᴀ ʟᴏᴡ ʀᴀᴛᴇ ᴏꜰ ꜱᴜʀᴠɪᴠᴀʟ ɪɴ ᴛʜᴇ ᴩʀᴏɢᴇɴɪᴇꜱ.

Answer 2

Answer:

In external fertilization, eggs have fewer chances of fertilization. This can lead to the wastage of a large number of the eggs during this process. Further, there is an absence of proper parental care to the offspring, which results in a low rate of survival in the progress.

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