What do you think? Were zebra mussels intentionally transported to the U. S.? Explain your reason for your answer.

no it was brought by accident

Explanation:In the case of zebra and quagga mussels, the introduction to the U.S. was accidental. They were probably brought to the Great Lakes as stowaways in the ballast water of a cargo ship that came from Europe or Asia. Ballast water is taken aboard to maintain stability and is discharged when new cargo is added to the ship.

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

i'd say that the moon rock is about 2.2 billion years old.