Si el pKa de los grupos de ácido carboxílico en el ácido acetoacético y el ácido bhidroxibutírico es de 3,6 y 4,7, respectivamente, ¿qué forma (protonada o desprotonada) está presente a pH fisiológico?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.