Which vertebrate group has most advanced respiratory structures?

fish, amphibians, reptiles, birds, or mammals?

Are the earth's ocean floor and continents the same age geologically? why or why not?

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

26 a medida que cambia el clima, ¿qué tipo de reproducción más probablemente de a una especie mayores posibilidades de supervivencia?