Use complete sentences to explain how breathing is affected in high altitudes. and no copying from other websites

Altitude changes the way your breathing functions. The air at higher altitudes contains less oxygen, therefore, you need to take more breaths to get the same amount of oxygen you normally would.

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.