Which evidence supports the theory that fish and mammals evolved from the same ancestor would it be their embryo share that features in the early stages of development they both produce egg and sperm sales that must join and fertilization their embryo share features in the late stages of development or they both emerge from fertilized eggs
The evidence that supports the theory that fish and mammals evolved from the same ancestor includes:
1. Shared embryonic features: Both fish and mammals exhibit similar features during the early stages of development, such as the presence of a notochord (a flexible rod-like structure) and pharyngeal gill slits. This similarity suggests a common ancestry.
2. Similar reproductive process: Both fish and mammals reproduce sexually by producing egg and sperm cells. In both cases, fertilization occurs when the sperm cell joins with the egg cell to form a zygote.
3. Shared late-stage embryonic features: As the development progresses, fish and mammal embryos both share certain characteristics in the late stages. For example, they both develop limb buds, which eventually grow into limbs, indicating a common developmental pattern.
4. Emergence from fertilized eggs: Both fish and mammals, as well as many other animal groups, emerge from fertilized eggs. This shared feature in their life cycle suggests a common ancestor.
Collectively, these pieces of evidence support the theory that fish and mammals evolved from a common ancestor.