One of the most commonly used methods of analysing the age of a certain crust is through analysis of its isotropic composition, such as the presence of the elements of tellurium and selenium. However, by general principle, the continental crusts are considered to be much older than the oceanic crusts.
Answer:
a.they work together to allow gas exchange
Explanation:
the trachea helps transport air to the lungs, the lungs fill with air, finally the alveoli convert the oxygen to the bloodstream
Answer:
1st level
Explanation:
Since the organism is a decomposer, it creates its own food, their for it's at the bottom of the food chain
The most likely cause of the burning sensation is acid reflux which travels back up the esophagus and irritates the esophageal lining. The chest pain felt can feel almost like a heart attack but it is best described as referred pain from the esophagus.
Should this heartburn persist, it is highly recommended to see a physician because the acid can erode the esophagus lining & the abdominal lining leading to ulcers. Easily treatable condition.
From a personal level this is awful!
