This chart shows four atoms, labeled W, X, Y, and Z. These atoms can combine with each other to form molecules. W = oxygen
X = hydrogen
Y = carbon
Z = oxygen (again)
Which combination of atoms will form a molecule, but not a compound?

W and X
X and Y
W and Z
Y and Z

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

the answer is 100% density i've answered this question before and done the quiz myself.