The zebra mussel is a shellfish native to europe. during the early 1900's, it was accidentally brought to the united states in the ballast of a ship traveling to the great lakes. it has no predators in the great lakes.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

What are the ingredients of oobleck?