Answer:
D
Explanation:
Vitamin C is one of the vitamins that humans can't produce in their liver. They need this vitamin from the external environment in the form of food. About 75- 90mg/day is it's the normal dosage. So, option D is correct.
Answer: The body maintains homeostasis by positive and negative feedback mechanism.
Explanation:
The body maintains the internal temperature and metabolism with respect to change in environment.
In case the temperature outside is very cold and the body starts shivering by the movement of skeletal muscles, this is done to maintain the temperature inside body. This is positive feedback.
When the temperature inside the body is maintained, then body stops shivering. This is negative feedback.
This is how the body maintains homeostasis.
Geosphere refer to the portion of the Earth system that include Earth's interior, rocks, and minerals
And hydrosphere refer to all the water on earth surface.
These two spheres often interact with each other in the water cycle
Hope this helps
