Which animal phylum is the largest?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

If your blood becomes too concentrated with iona, what will happen to the red blood cells

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?