Hat does this suggest? what does this suggest? the presence or absence of four limbs is not a useful character for studying evolutionary relationships among vertebrates. of the species in the table, rattlesnakes are most closely related to lampreys. rattlesnakes are more closely related to bass than they are to frogs, turtles, and leopards. the presence or absence of four limbs, on its own, could be misleading when considering the evolutionary relationships of rattlesnakes.

The answer to this question is the presence or absence of four limbs, on its own, could be misleading when considering the evolutionary relationships of rattlesnakes.
This happens when we consider the phylogenetic relationships between different groups of organisms using just one trait or a gene can give misleading results. In this situation, the absence of limbs is a new characteristic (snakes used to have four limbs like all the other vertebrates, and phytons and boa snakes still have some skeletal elements of the limbs in their bodies) so if we used the absence of limbs as a defining trait, that would mean that the rattlesnakes are more related to lamprey which are also limbless, than to other reptiles that have limbs, which is incorrect. 

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.