How do you think the hummingbird evolved traits, such as bill shape, that make certain flower species ideal food sources? And
how did these flower species evolve the traits necessary to attract
hummingbirds?

siento que todas las especies han evolucionado de acuerdo a sus antepasados y a las formas de vida

Explanation:

las formas de vida es la supervivencia el pico se fue adaptando para mejorar la almentacion de la flor

las especies de flores atrayeron a los colibries porque todo es un ciclo si los colibries no se alimentaran no existirian y si no existen pienso que el polen o lo que consumen de las plantas se perderia

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.

the answer would be   10%