Answer:
the difference is that its bigger
Explanation:
its bigger because birds are much smaller than mammals and they dont have as big as bones like mammals
Answer:
Neutron-capture inside stars.
Explanation: Although there are other minor contributions they are not only produced in stars that explode in supernova.
Answer:Exocrine glands are glands that secrete substances onto an epithelial surface by way of a duct.
Answer:
either oxygen or argon, because they are both in the atmosphere
Explanation: