Question

State any two characteristics of the tapetum, present in the microsporangium of an angiosperm.

Answer 1

Main functions of TAPETUM

1. Transportation of nutrients into anther locule at the time of meiosis in spore mother cells

2. Secretion of enzymes and hormones

3.Providing nutrition to the growing micro sporangium.

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Answer 2

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★ A ᴛʏᴘɪᴄᴀʟ ᴍɪᴄʀᴏsᴘᴏʀᴀɴɢɪᴜᴍ ᴀᴘᴘᴇᴀʀs ᴄɪʀᴄᴜʟᴀʀ ᴀɴᴅ ɪs sᴜʀʀᴏᴜɴᴅᴇᴅ ʙʏ ғᴏᴜʀ ᴡᴀʟʟs:

(ɪ) ᴇᴘɪᴅᴇʀᴍɪs: ɪᴛ ɪs ᴛʜᴇ ᴏᴜᴛᴇʀᴍᴏsᴛ sɪɴɢʟᴇ ʟᴀʏᴇʀ ᴏғ ᴄᴇʟʟ ᴡʜɪᴄʜ ɪs ᴘʀᴏᴛᴇᴄᴛɪᴠᴇ ɪɴ ɴᴀᴛᴜʀᴇ.

(ɪɪ) ᴇɴᴅᴏᴛʜᴇᴄɪᴜᴍ: ɪᴛ ɪs ᴛʜᴇ sᴇᴄᴏɴᴅ ʟᴀʏᴇʀ ᴡɪᴛʜ ᴛʜɪᴄᴋ ᴄᴇʟʟs, ʜᴇʟᴘ ɪɴ ᴅᴇʜɪsᴄᴇɴᴄᴇ ᴀɴᴅ ɪs ᴘʀᴏᴛᴇᴄᴛɪᴠᴇ ɪɴ ɴᴀᴛᴜʀᴇ.

(ɪɪɪ) ᴍɪᴅᴅʟᴇ ʟᴀʏᴇʀ: ɪᴛ ɪs ᴛʜᴇ ᴛʜɪʀᴅ ʟᴀʏᴇʀ ᴄᴏᴍᴘᴏsᴇᴅ ᴏғ 1-3 ʟᴀʏᴇʀs ᴏғ ᴄᴇʟʟs, ʜᴇʟᴘ ɪɴ ᴅᴇʜɪsᴄᴇɴᴄᴇ ᴀɴᴅ ɪs ᴘʀᴏᴛᴇᴄᴛɪᴠᴇ ɪɴ ɴᴀᴛᴜʀᴇ.

(ɪᴠ) Tᴀᴘᴇᴛᴜᴍ: ɪᴛ ɪs ᴛʜᴇ ғᴏᴜʀᴛʜ ᴀɴᴅ ɪɴɴᴇʀᴍᴏsᴛ ʟᴀʏᴇʀ ᴏғ ᴄᴇʟʟ ᴡɪᴛʜ ᴅᴇɴsᴇ ᴄʏᴛᴏᴘʟᴀsᴍ ᴀɴᴅ ᴍᴀɴʏ ɴᴜᴄʟᴇɪ. ɪᴛ ᴘʀᴏᴠɪᴅᴇs ɴᴏᴜʀɪsʜᴍᴇɴᴛ ᴛᴏ ᴛʜᴇ ᴅᴇᴠᴇʟᴏᴘɪɴɢ ᴘᴏʟʟᴇɴ ɢʀᴀɪɴs.

★ᴛʜᴇ ᴄᴇɴᴛʀᴇ ᴏғ ᴇᴀᴄʜ ᴍɪᴄʀᴏsᴘᴏʀᴀɴɢɪᴜᴍ ɪs ғɪʟʟᴇᴅ ᴡɪᴛʜ ᴄʟᴏsᴇʟʏ ᴀʀʀᴀɴɢᴇᴅ sɪᴍɪʟᴀʀ ᴄᴇʟʟs ᴄᴀʟʟᴇᴅ sᴘᴏʀᴏɢᴇɴᴏᴜs.

★ᴀᴛ ᴍᴀᴛᴜʀɪᴛʏ, ᴘᴏʟʟᴇɴ sᴀᴄ ɪs ғᴏʀᴍᴇᴅ ʙʏ ғᴜsɪᴏɴ ᴏғ ᴛᴡᴏ ᴍɪᴄʀᴏsᴘᴏʀᴀɴɢɪᴜᴍ ɪɴᴇᴀᴄʜ ʟᴏʙᴇ.

★ᴀ ᴍᴀᴛᴜʀᴇ ᴀɴᴛʜᴇʀ ᴅᴇʜɪsᴄᴇs ʙʏ sʟɪᴛs ᴀɴᴅ ʟɪʙᴇʀᴀᴛᴇ ᴛʜᴇ ᴘᴏʟʟᴇɴ ɢʀᴀɪɴ.