i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .
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.
for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .