Science can answer many questions for example the speed of light, the frequency of pitch or sound, dna tests
They allowed scientists to study heredity and further develop it
Answer:
2 materials are exchanged between fetal and maternla blood
Explanation:
i just took this test and this was correct
Hyennas, and leopards hope this helps <span />
Some molecular studies point to amphibians descending from the lung fish, the Diponi.
Under the class Amphibia, amphibians are tetra-pod, cold blooded vertebrates without having scales. Protein is produced by the special skin of Amphibians.
Lung fish belong to the subclass of Diponi, these are living air breathing species.
