An unprotected traveler's blood would boil at normal body temperatures because the pressure is so low. Temperatures in the mesophere decreases with altitude, because there are few gas molecules in the mesophere to absorb the sun's radiation, the heat source is the stratosphere below. The air in the mesophere has extremely low density and as a result the air pressure is very low.
B. is the answer i really hope i helped please mark as brainliest.
Answer
HBA HBs
Explanation:
In some parts of Africa, up to 20% of the population are carriers of the sickle cell gene. This suggests that the trait must have a survival value. The carriers of the trait have a much lower susceptibility to malaria than normal individuals. This is because the malaria parasite survives very poorly in sickled red blood cells.
The red algae was the plant group that includes the Ancestors of plants.
