May combine to form larger structures

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

What is a costume plot? why is it important to a film or theater production?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.