I think will be A !!!!!!!!!
Answer: age, smoking habits, and size/weight
Explanation:
The older you get, the weaker you'll be, so your breathing will be effected.
If you smoke then your lungs will be effected which will ultimately have an affect your breathing.
If you're really heavy (ex. Over weight) then you will get tired more easily, which will effect your breathing rate.
Marsupials began to migrate to Australia and New Zealand from North America in the late Cretaceous or early Tertiary period. The route of migration crossed Antarctica and into Australia.
Answer: (B) an integral membrane protein
Explanation:
Integral membrane proteins are deeply embedded in the nuclear membrane. While some integral extend only into the membrane matrix, Some integral proteins span the whole nuclear membrane and are called trans-membrane proteins because the span from the extracellular nuclear membrane to the innercellular membrane. The serve as transport channels.
