How are malignant tumors different from benign tumors?

Malignant tumors are much more harmful. It is cancerous and can spread to the rest of the body. Benign are not cancer and do not spread. They are not a big deal unless they are pressing on something like vital blood vessels or nerves. I remember the difference by looking at the prefix on these words. Mal means bad (like mal-practice) and ben means good (like beneficial)

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.