Family and twin studies examining the rates of autism spectrum disorder have provided compelling evidence for a genetic influence in the development of the condition. in fact, the concordance rate of autism spectrum disorder was in identical twins

In fact, the concordance rate of autism spectrum disorder was twice in identical twins that of non-twin siblings.

It has been shown that genetic has a huge influence on the development of autism spectrum disorder and that autism in identical twins was 13 times that of the general population. This suggest that environmental factors in the womb are the major factors that contribute.

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.