Answer:
Lightly pigmented people tend to be at higher risk of vitamin D deficiency
Explanation:
BACKGROUND KNOWLEDGE:
Human skin is the largest organ of the body which makes boundary line between environment and internal conditions. Human skin cell produces pigment called melanin when ever it is subjected to Sun. More the melanin pigment produced more will be the skin darkens. Ultraviolet (UV) radiations also come from Sun and responsible for more pigmentation.
ANSWER EXPLANATION:
According to the question darkly pigmentation only occurs when their is high level of UV radiations. High level of UV radiations are also responsible for Vitamin D production.
People with lightly pigmented means that there environment has low level of UV radiations which are the requirement of Vitamin D production. Hence due to low UV radiations peoples with light pigmentation's are also be at higher risk of vitamin D deficiency
Live only on land. There are many species of underwater plants on Earth. :)
Answer:
It travels as fast as bullets and can hit satellites, shuttles, and the Space Station.
Explanation:
Arteries carry blood away from the heart
Answer:
most likely the water was evaporated by the sun
Explanation: Evaporation is the process in the water cycle when water particles heat up and turn from a liquid into a gas.
