Question

During the early stages of embryo development, dolphins have gill pouches. What does this mean?
a.Dolphins evolved from fish.
b.Fish evolved from dolphins.
c.Dolphin embryos go through a fish phase during development.
d.Dolphins and fish share a distant, common ancestor.

Answer 1

the answer is letter C.
Dolphin embryos go through a fish phase during development..rather..that's the final answer..

Answer 2

User: During the early stages of embryo development, dolphins have gill pouches. What does this mean? Dolphins evolved from fish. Fish evolved from dolphins. Dolphin embryos go through a fish phase during development. Dolphins and fish share a distant, common ancestor.

Weegy: C.Dolphin embryos go through a fish phase during development.

Answer 3

The major distinction between fishes and dolphins is that one is a mammal while the other is not. Most fish species by convention are ectothermic or cold blooded, which means that in order to control body temperatures they must move to the desired environment to warm up or cool down. Dolphins however being a mammal does not need environmental conditions to achieve temperature homeostasis thanks to a warm blood circulatory system.

From an evolutionary perspective, dolphins and fishes would share a very distant common ancestor. This ancestor would be related genetically to both fish and mammals alike. However the use of the word "fish" to describe this ancestor would be misplaced since the ancestor would be distantly related to both dolphins and fish alike by today's standards.

The embryo of which the dolphin is derived from would share some very subtle traits that are derived from this common ancestor. In this case gills would be a common feature for both fish and dolphin embryos alike. In fact human embryos also have gills, except these gills eventually form our ears. It is very difficult to distinguish the difference in species when an embryo is in its early stages. Take a look http://www.life.umd.edu/classroom/biol106h/Lec8/Embryo.jpg

This suggests that all life on earth came from a common ancestor hundreds of millions of years ago.

Answer 4

http://pigeonchess.com/2012/05/31/gill-slits-by-any-other-name/

Answer 5

http://carolguze.com/text/102-16-evolution2.shtml