Question

discovered nucleus in orchid leaf ​

Answer 1

Answer:

Robert Brown observed the nucleus in the year 1931. He observed the in the epidermis of orchid leaves. The nucleus controls all the metabolic functions of a cell.

Explanation:

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Answer 2

ʀᴏʙᴇʀᴛ ʙʀᴏᴡɴ ᴏʙsᴇʀᴠᴇᴅ ᴛʜᴇ ɴᴜᴄʟᴇᴜs ɪɴ ᴛʜᴇ ʏᴇᴀʀ 1931. ʜᴇ ᴏʙsᴇʀᴠᴇᴅ ᴛʜᴇ ɪɴ ᴛʜᴇ ᴇᴘɪᴅᴇʀᴍɪs ᴏғ ᴏʀᴄʜɪᴅ ʟᴇᴀᴠᴇs. ᴛʜᴇ ɴᴜᴄʟᴇᴜs ᴄᴏɴᴛʀᴏʟs ᴀʟʟ ᴛʜᴇ ᴍᴇᴛᴀʙᴏʟɪᴄ ғᴜɴᴄᴛɪᴏɴs ᴏғ ᴀ ᴄᴇʟʟ.