The 'Roma' tomato is not an heirloom. It is however an open pollinated, so it is somewhat like an heirloom, just not old enough to fit the category.
'Roma' is a very good tomato for sauces as is the 'Amish Paste' heirloom tomato.
Both of them have very little seed and meaty flesh which is what you want for doing up tomato sauces and salsa.
Any plant that is not a true species should be propagated vegetatively.
This is all a matter of taste, but heirloom varieties tend to have the best flavors. Check out Johnny's or Seed Savers (they sell transplants) for hundreds of options.
No you can not I have never eaten an apple with no pips, but a mutation is always possible. That is why we have seedless bananas, seedless watermelons, and seedless grapes. If a seedless variety should happen to be found or bred, it will then be cultivated for its commercial appeal. Of course, it has to taste good, too. Seeds aren't everything.
The answer is never! The seedless watermelon is in fact not anything of the sort. On the contrary it has many seeds. I just ate a slice about a few minutes ago and low and behold my seedless watermelon had seeds, albeit edible seeds, but seeds nonetheless. This new fruity invention should be called the watermelon with edible seeds. Of course that doesn't have the same ring as the "seedless watermelon"
I don't believe there are any laws regarding how old produce has to be before it can't be sold as 'fresh' produce. Refrigeration should not have anything to do with that. The saleability of the produce is generally left up to the produce manager.
u should need 30-45 tomatoes
tomatoes
About 1lb of tomatoes will yield 2 cups chopped tomatoes. So in your case, 1/2 lb should do it.
You can freeze tomatoes in any form, the only effect freezing has on tomatoes is that they will soften when defrosted, similar to canned tomatoes.
spray with water
yes
Rotel tomatoes are high in acid so you should be able to use them when canning green tomatoes. They will increase the acidity level of the finished product.