Question

is appearance the only characteristic that determines that determines if an individual plant or animal is suited to its environment if so explain PLEASE ANSWER I WILL LOVE U FOREVER

Answer 1

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.