9. a county has recently evolved from underdeveloped to developed and the birth and death rate have stabilized. this is known as
a. zero population growth.
b. demographic transition
c. birth stabilization.
d. death stabilization.

A. Zero population growth.

Explanation:

I took the test.

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.