Question

 Define external fertilization. Mention its disadvantages.​

Answer 1

Answer:

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

Answer 2

Answer:

ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ ɪꜱ ᴀ ᴍᴏᴅᴇ ᴏꜰ ʀᴇᴘʀᴏᴅᴜᴄᴛɪᴏɴ ᴄʜᴀʀᴀᴄᴛᴇʀɪᴢᴇᴅ ʙʏ ᴛʜᴇ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ ᴏꜰ ᴍᴀʟᴇ ᴀɴᴅ ꜰᴇᴍᴀʟᴇ ɢᴀᴍᴇᴛᴇꜱ ᴏᴜᴛꜱɪᴅᴇ ᴛʜᴇ ʙᴏᴅʏ ᴏꜰ ᴛʜᴇ ᴏʀɢᴀɴɪꜱᴍꜱ. ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ ɪꜱ ᴏʙꜱᴇʀᴠᴇᴅ ɪɴ ᴀᴍᴘʜɪʙɪᴀɴꜱ ꜱᴜᴄʜ ᴀꜱ ꜰʀᴏɢꜱ ᴀɴᴅ ᴛᴏᴀᴅꜱ. ʜᴏᴡᴇᴠᴇʀ, ᴛʜᴇʀᴇ ᴀʀᴇ ᴀ ꜰᴇᴡ ᴅʀᴀᴡʙᴀᴄᴋꜱ ᴏꜰ ᴇxᴛᴇʀɴᴀʟ ꜰᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ:

ᴛʜᴇ ᴄʜᴀɴᴄᴇꜱ ᴏꜰ ꜱᴜʀᴠɪᴠᴀʟ ᴏꜰ ᴛʜᴇ ɢᴀᴍᴇᴛᴇꜱ ᴀʀᴇ ᴠᴇʀʏ ʟᴇꜱꜱ.

ɴᴏᴛ ᴀʟʟ ᴛʜᴇ ɢᴀᴍᴇᴛᴇꜱ ᴀʀᴇ ꜰᴇʀᴛɪʟɪᴢᴇᴅ.

ᴛʜᴇ ɢᴀᴍᴇᴛᴇꜱ ᴍɪɢʜᴛ ᴅᴇꜱɪᴄᴄᴀᴛᴇ.

ᴛʜᴇ ᴘʀᴇᴅᴀᴛᴏʀꜱ ᴜꜱᴜᴀʟʟʏ ᴇᴀᴛ ᴛʜᴇ ᴇɢɢꜱ.