Yes, you need an insurance license to sell any kind of insurance in Texas. For "Commercial Insurance" operations, you will need a Property and Casualty Insurance License form the state of Texas.
Depend of your location. Some countries don't need any license and some does.
No. If you have a trading account then you can use that to directly buy or sell stocks.
Yes, you need a license to sell cigarettes.
Yes, you need a license to sell cigarettes.
You do not need a license to sell clothes. You may need a license to sell on the street or in a store. It also depends on the volume of your sales.
Though you do not need a license to specifically sell diamonds you do need a jewelers license to sell diamonds. If you want to sell diamonds it will require you to fill out applications for a jewelers license once you have completed that you are eligible to sell diamonds.
No you don't need a license to sell mullet.
No it is not necessary to have a business permit or license to sell merchandise at any kind of convention.
No, you do not need a business license to sell Tupperware.
Yes, in most places, you need a vendor's license to sell food.
In order to sell plants as a business, you will need to first get a business permit. From there, you will need to get a business license.