Why starfish have such a heightened sense of smell.

Chemoreceptors on the starfish's skin can detect the faintest smell of its prey (clams), and even determine the direction from which it is coming.Because starfish lack teeth, they must convert their food to liquid form before they can ingest it. Among the other prey items this bottom-dwelling predator eats are sea urchins, other starfish, small fish, sponges, and carrion.

Explanation:

Hope this helped Mark BRAINLIEST!!!

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.