Why do tribes who live in high altitude of Himalayas experience discomfort in respiration? How do they get adapted to survive in such a situation?

Assertion: Many tribes live in the high altitude of Himalayans have a higher red blood cell count or total hemoglobin than people living in the plains. Reason: At high altitude, body does not get enough oxygen.

Our body is accustomed to high atmospheric pressure on ground. If we encounter, a low atmospheric pressure as is th case on high altitude we will experience the bursting of body cells, bleeding of nose and a high blood preussure. But in space, where astronauts dare to travel, atmospheric pressure does not exist at all. How do they cope with such condition?

How do elephant living in the tropical rainforest adapt itself.

Why do people suffer from altitude sickness after reaching the high altitude regions ? How does their body acclimatized after a couple of days ?

We see so many people around us who do not get enough food to eat. Why is this so?

How do kangaroo rats and desert plants adapt themselves to survive in their extreme habitat ? Explain .

Why bacteria do not survive in the salt pickle which has high salt contents

Why do high altitude areas have brighter sunlight and lower temperatures as compared to the plains?

Four men light a 250 kg box to a height of 1m and hold it without raising or lowering it. (a) How much work is done by the men in lifting the box ? (b) How much work do they do in just holding it ? (c ) why do they get tired while holding it ? (g = 10m//s^2)

Lichen is usually cited as an example of symbiosis in plants where an algal and fungal species live together for their mutual benefit. Which of the following will happen if algal and fungal partners are separated from one another ? (a) Both will survive and grow normally and independent of each other. (b) Both will die. (c) Algal component will survive while fungal component will die. (d) fungal component will survive while agal component will die. Based on your answer how do you justify this association as symbiosis ?