Carlos learns that all living things have cells with the same system of genetic material. Scientists have concluded that this shows that all living things had a common ancestor. Carlos finds this difficult to understand as he looks at pictures of a dog and snake. He cannot see many similarities between them, but what shows evidence of their common evolutionary past?

A. DNA
B. gene transfer
C. natural selection
D. endosymbiosis

A. ADN

Explanation:

El ADN no logra copiarse con precisión

La mayoría de las mutaciones que pensamos que son importantes para la evolución suceden de forma natural. Por ejemplo, cuando una célula se divide hace una copia de su ADN y, algunas veces, esa copia no es perfecta. Esa pequeña diferencia con la secuencia de ADN original es una mutación.

the sample answer on e2020

conflicting values are demonstrated between two different groups in animal farm. first, the farm animals value hard work. this is shown by them working late and working long hours at the request of the pigs. napoleon and the pigs, however, sleep late daily. furthermore, the animals value equality. this differs from the value of napoleon and the other pigs. instead of equality, they value only gaining power and maintaining their own privilege, which is demonstrated by their taking extra milk and sleeping in beds.