Other than having a variation in beak characteristics, describe another variation in a finch species that could
promote survival of an individual bird. support your answer. [1]

Other than having a variation in beak characteristics, another variation in a finch species that could promote survival of an individual bird would be its wingspan. 

There is sand and mud

I’m not exactly sure what your trying to ask, but if it’s how an organelle is similar to a body system or a part a nucleus is like a in function. but i don’t fully understand what you’re trying to ask