Why don't invertebrates make up their own clade? What % do invertebrates make up of all animals? help would be nice :)

No links!!​

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

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Veronica and her little sister, monique, are playing on a seesaw. if veronica weighs 75 pounds, and monique weighs 60 pounds, which statement is true?