Question

b. list three or more differences in the bone structure of the four animals shown.

1. describe the location of the \blue print\ that determines the structure of each of these forelimbs as the organism develops from embryo to infant.
2. what do the similarities among the forelimb bone arrangement of these diverse animals imply about their ancestry?
3. which two animals in model 2 would you predict have the most dna sequences in common? explain.

Explanation:

1. The "blue - print" is DNA located in the nucleus of every cell. During development, genes in DNA are expressed to determine forelimb structure.
2. Similar forelimb bone arrangements imply that these diverse animals share a common ancestor. Homologous structures are evidence of evolutionary relationships.
3. Animals with more similar forelimb bone arrangements are likely to have more DNA sequences in common. For example, if two animals have very similar bone shapes, sizes, and arrangements in the forelimb, they likely have a closer evolutionary relationship and thus more similar DNA.

Answer:

1. DNA in the nucleus of every cell.
2. They share a common ancestor.
3. The two animals with the most similar forelimb bone arrangements. Reason: Closer evolutionary relationship indicated by similar bone structure likely means more similar DNA.