The length of a giraffe's neck

A clam's hard shell allows it to burrow

Squirrel's collecting nuts and hiding them for winter

Some blackbirds defend larger territories than others

The ability to survive in salty water, extremely large population numbers, eggs hatch in wide variety of numbers

Warm thick coat of fur, large fur covered hooves for gripping ice, migrate

Needles for regulating temperature, storing water in trunk, needles to protect from predators

Turtles grow hard shells as a response to their environment

Variation in a population is important for species survive

What is the term for the genetic makeup, or the the genes, that an organism carries?

What is the term for how traits express themselves in an organism?