That some newly hatched turtles can swim faster than others of the same species is evidence of

variations

Explanation:

Variation is a factor that allows individuals of the same species to have different characteristics and even different structures. An example of this can be seen in the question above where filhostes turtles, which have just hatched and need to reach the water quickly, have different speeds. Some turtles run faster to get to the water, while others are slower (and often end up being caught by predators).

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.