What is the difference between a unicellular organism and multicellular organism? Select one:
a. Unicellular organisms are made up of a single cell, while multicellular organisms are made up of several cells.
b. Unicellular organisms are not living, while multicellular organisms are living.
c. Unicellular organisms are highly organized into tissues and organs, while multicellular organisms are simple.
d. Unicellular organisms do not need water, while multicellular organisms do need water.

A.

Explanation:

From the name, "unicellular" you can deduce that "uni" means one, and vice versa for multicellular "multi".

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.