Answer : Oxygen
I hope that's help !
b. Breaking the bonds in a disaccharide
c. Breaking a single carbon bond
d. Creating bonds to make a simple sugar
Answer: B - Breaking the bonds in a disaccharide
Explination: Just took the test.
The answer is letter C. Radon
One of the natural pollutants in ground water system is radon gas. Radon gasses are from the Uranium decay from the Earth’s crust and possibly enter the groundwater system. There is a big possibility that the water that enters our home from the groundwater system can be polluted.
Radon is a source of natural groundwater pollution (option B)
Radon is a naturally occurring radioactive gas that is colorless, odorless, and tasteless. It is formed from the decay of uranium, which is found in all rocks and soils. Radon can seep into homes and buildings through cracks and other openings in the foundation. It can also be found in groundwater.
Radon is a health hazard because it can cause lung cancer. When you breathe in radon, the radioactive particles can get trapped in your lungs. Over time, these particles can damage DNA and lead to cancer.
Learn about radon here brainly.com/question/31577197
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b. higher levels of hemoglobin
c. insulating feathers
d. higher body temperatures
The correct answer is option b. higher levels of hemoglobin.
The partial pressure of the oxygen decrease as the height from the sea level is increased. Due to the decrease in the partial pressure, the amount of the oxygen delivered by the hemoglobin to cell decrease. So, in order to cope up the condition, the amount of the hemoglobin in the blood is increased. the increased amount of the hemoglobin delivers more oxygen than the normal amount of hemoglobin can do, so, it help in survival at low oxygen levels.