You have decided to ascend to the summit of Mount Everest, where the partial pressure of oxygen in the atmosphere has been estimated to be about 54 mmHg. Recall that when this air arrives in the alveoli, the partial pressure of oxygen drops even lower because of displacement by the partial pressure of carbon dioxide and water vapor. The arterial concentration of oxygen at the pulmonary capillaries is measured and found to be 25 mmHg. What is the percent saturation of hemoglobin at this partial pressure

Blood will come back to the heart through the veins(smaller veins coming together turn into the inferior vena cava then go to the right atrium).

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.