Is appearance the only characteristic that determines that determines if an individual plant or animal is suited to its environment if so explain answer i will love u forever

No. Yes phenotypes are important for example those with longer legs can run faster and hence escape predators

But genes also code for unseen proteins

For example, if a disease is introduced those with long legs won't survive but those who have the genes which code for the complimentary antibody have the ability to kill the pathogen and hence survive.

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

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