Question

Which conclusions can be made about the animals of each class based on the structural similarities of the embryos?

1) There is an evolutionary link among the classes.
2) The adults of each class may share structural similarities.
3) Reptiles must have given rise to fish and amphibians.
4) Animals of each class have analogous structures.

Answer 1

The structural similarities of the embryos provide evidence of common ancestry and may be preserved in the adults of related species. However, it is important to consider additional evidence when determining evolutionary relationships among different animal classes.

Step-by-step explanation:

Based on the structural similarities of the embryos, we can draw the following conclusions about the animals of each class:

1. There is an evolutionary link among the classes, as these structural similarities suggest a common ancestry.
2. The adults of each class may share structural similarities, as the embryonic similarities may be preserved in the adults of related species.
3. It is not accurate to conclude that reptiles gave rise to fish and amphibians based solely on the structural similarities of embryos. The evolutionary relationships among these groups are more complex and require a broader range of evidence to determine.
4. It is accurate to say that animals of each class have analogous structures, as some structures may appear similar but have different origins or functions.