A membrana plasmática é basicamente uma borda entre o interior de uma célula e seu exterior. A membrana regula o que entra e sai da célula e é necessária para a sobrevivência da célula. sem ele, todo o conteúdo da célula se espalharia. Isso seria ruim. Cada célula tem uma membrana, assim como as organelas dentro da célula.
It would be A; Or 0 because since the dominate trait is being able to roll the tongue, it over rules the recessive.
Answer:
In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.
Explanation:
In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.
It is important for survival to fight or respond to flight because it controls the physiological reaction to a risk or danger and this flight and flight response is activated by sympathetic nervous system. This system is a part of automatic nervous system and operated by various interconnected neuron
Answer:
The correct answer is: geography and UV radiation.
Explanation:
Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.
The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).
Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.
