Yes. This can be done with combinations such as rice and beans, fro instance (as well as many other grain and legume combinations). For vegetarians who drink milk (lactovegetarians) they obtain all 20 essential amino acids from milk products.
What are the main sources of vitamins for vegetarians
The vegetarians obtain energy in the energy pyramid because vegetables contain more nutrients
Meat contains protein, which is essential for life; although vegetarians obtain protein from other sources (e.g. nuts and beans), meat is generally considered as the best protein source.
Electric circuit
foodThey obtain two essential things. They are energy and carbon
Protein shakes are doubtlessly of nutritional value to many vegetarians, but I would not say that all vegetarians should necessarily drink them, because there are various ways of obtaining a sufficient amount of protein in your diet without having to eat meat. For example, some vegetarians still eat dairy products (food made from milk) even though it is of animal origin; it is still not meat, and cows are not harmed by being milked. Cheese is very high in protein. Even for those vegetarians who do not eat dairy products, there are ways of combining carefully chosen vegetable foods in order to obtain usable protein. Tofu, made from soy beans, is also a good source of protein (not as good as cheese). But shakes are good.
essential are ones that you must obtain from your diet or other methods where as non essential ones are ones which your body produces
Are smaller groups that are trying to obtain power or benefits.
In order to obtain essential vitamins, minerals, antioxidants and phytochemicals.
Autotrophs and Hetrotrophs.
Hat
No, killing the pig is not essential to the survival of the group. There are other ways to obtain food and resources for survival without harming animals.