How does the sea spider keep from sinking ?

is this a psat question, if so do not cheat try your best.

i think it is dna, i'm not totally sure but i think it might be.

true                                                                                                       true true true true true true

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!