Answer:
Air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to burn. Oxygen supports the chemical processes that occur during fire. When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and generating combustion products (gases, smoke, embers, etc.).
Explanation:
Answer:
The map distance between genes J and L is 55 map units
Explanation:
Map distance between genes J and K = 20 map units
Map distance between genes K and L = 35 map units
Map distance between genes J and L = map distance between genes J and K + map distance between genes K and L = 20 map units + 35 map units = 55 map units
They’re known as gateway drugs.
In this kind of population, the make up of the population's gene pool will remain virtually the same as long as these conditions hold. In this kind of situation, no evolution can take place, all thing will remain the same. For evolution to occur, competition must exist.