Question

what is meant by double fertilisation

Answer 1

Double fertilization occurs in plants which involves two processes. The male gamete of pollen grain fertilizes the egg cell and also fuses with two polar nuclei to produce a zygote which is diploid and after dividing mitotically it forms embryo.

Answer 2

Answer:

Dᴏᴜʙʟᴇ ғᴇʀᴛɪʟɪsᴀᴛɪᴏɴ :

Pᴏʟʟᴇɴ ᴛᴜʙᴇ ʀᴇʟᴇᴀsᴇs 2 ᴍᴀʟᴇ ɢᴀᴍᴀᴛᴇ ɪɴ ᴄʏᴛᴏᴘʟᴀsᴍ ᴏғ sʏɴᴇʀɪᴅs.

❇️ Oɴᴇ ᴍᴀʟᴇ ɢᴀᴍᴀᴛᴇ ғᴜsᴇs ᴡɪᴛʜ ᴇɢɢ ᴄᴇʟʟ ᴛᴏ ғᴏʀᴍ ᴢʏɢᴏᴛᴇ ➡️ sʏɴᴀɢᴀᴍʏ

❇️ ᴀɴᴏᴛʜᴇʀ ᴍᴀʟᴇ ɢᴀᴍᴀᴛᴇ ᴍᴏᴠᴇ ᴛᴏᴡᴀʀᴅs 2 ᴘᴏʟᴀʀ ɴᴜᴄʟᴇɪ ʟᴏᴄᴀᴛᴇᴅ ɪɴ ᴛʜᴇ ᴄᴇɴᴛʀᴀʟ ᴄᴇʟʟ ᴀɴᴅ ғᴜsᴇs ᴡɪᴛʜ ᴛʜᴇᴍ ᴛᴏ ᴘʀᴏᴅᴜᴄᴇ ᴛʀɪᴘʟᴏɪᴅ ᴘʀɪᴍᴀʀʏ ᴇɴᴅᴏsᴘᴇʀᴍ ɴᴜᴄʟᴇᴜs.

As ᴛʜɪs ɪɴᴠᴏʟᴠᴇs ғᴜsɪᴏɴ ᴏғ ᴛʜʀᴇᴇ ʜᴀᴘʟᴏɪᴅ ɴᴜᴄʟᴇɪ ɪᴛ ɪs ᴛᴇʀᴍᴇᴅ ᴛʀɪᴘʟᴇ ғᴜsɪᴏɴ.

Sɪɴᴄᴇ 2 ᴛʏᴘᴇ ᴏғ ғᴜsɪᴏɴ, sʏɴᴀɢᴀᴍʏ ᴀɴᴅ ᴛʀɪᴘʟᴇ ғᴜsɪᴏɴ ᴛᴀᴋᴇ ᴘʟᴀᴄᴇ ɪɴ ᴀɴ Eᴍʙʀʏᴏ sᴀᴄ ᴛʜɪs ɪs ᴛᴇʀᴍᴇᴅ ᴀs ᴅᴏᴜʙʟᴇ ғᴇʀᴛɪʟɪsᴀᴛɪᴏɴ.

ᗷᗴ ᗷᖇᗩIᑎᒪY !

TᕼᗩᑎK ᑌ :-)