1. This fossil snake and this living rat both have a structure in their skull called the quadrate bone.
What best explains why both species have a quadrate bone?

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

I’m stuck on this question cuz i’m stupid sksksksk