Scientists classifying modern animals are most likely to compare

a) structure of the animals' atp
b) function of the animals' limbs
c) composition of the animals' bones
d) sequence of the animals' dna

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Several billion years ago which gas was the least prevailant in the atmosphere