If changes in a genes' dna sequence can change proteins, which of the following statements is false?

a. phenotypes may be directly affected.
b. there is a molecular basis for genetic disorders.
c. amino acid sequences would be altered.
d. genetic disorders cannot be caused by changes in just one individual gene.

The false statement is  

D. Genetic disorders cannot be caused by changes in just one individual gene.

Explanation:

Genetic disorders are caused by changes in DNA sequence due to mutation which will result in protein alteration which causes different disorders

Not only in gene, a change in single nucleotide or deletion of single nucleotide in the DNA sequence can cause a genetic disorder.  

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.