Bats share the same bones of the forelimb as humans, including a humerus, radius, ulna, wrist and hand bones, that they both inherited from a common ancestor. Though our arms and the arms of bats function differently ibats fly, and we do nott), the shared forelimb structure is an example of:

a. homology
b. phylogeny
c. analogy
d. systematics

Homology is similarity due to shared ancestry between a pair of organisms in different taxa. Both bats and humans have a common mammalian ancestor.

They diverged and adapted their arms for different functions.

Explanation:

Homologous features are physical features shared due to evolutionary history (a common ancestor).

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.