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AleksAgata [21]
3 years ago
14

FASSST!!!physical science!!!!!

Biology
1 answer:
scoray [572]3 years ago
5 0

Answer:

The answer is double replacement :)

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Which of these resources are renewable? Check all that apply.
aksik [14]

Answer:

Wind

Tides

Geothermal energy

Explanation:

1. Wind does not contaminate and is inexhaustible.

2. Tides are due to gravitational interaction with the Moon and Sun and the Earth's rotation, so it is classified as inexhaustible.

3. Geothermal energy is renewable because heat is continuously being produced inside the Earth, at the core.

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3 years ago
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Human populations in low-UV environments tend to have more lightly pigmented skin. One explanation is that the selective pressur
nikdorinn [45]

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

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