Generally, primates have all of the following characteristics except.
a. enhanced sense of vision.
b. enhanced sense of touch.
c. enhanced sense of smell.
d. reduced sense of smell.

c. enhanced sense of smell.

Explanation:

Primates are an incredibly diverse group of living species between 190 and 350 based on various taxonomic structures and show a broad variety of characteristics that help differentiate them from other mammals.  

The hands ofprimates are particularly sensitive and contribute to the sense of contact. Relative to other mammals, the brain areas that deal with eye-hand coordination and stereoscopic are very good and vision are especially large.  

The smell characteristics decreases to survive for animals which develop a dependence on other senses, such as hearing or sight.

Hence the correct option is c. enhanced sense of smell.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.