UNIVERSE
LIFE IN THE SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They believe that hydrogen is the foundation of all life.
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They believe that water is essential for life on Earth.
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Without the oxygen in water, life can’t make food.
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Photosynthesis requires water to produce energy.
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Detailed explanation-1: -Liquid water is an essential requirement for life on Earth because it functions as a solvent. It is capable of dissolving substances and enabling key chemical reactions in animal, plant and microbial cells. Its chemical and physical properties allow it to dissolve more substances than most other liquids.
Detailed explanation-2: -Liquid water is a necessity for every form of life known, with the possible exception of some plants or fungi that may get by on water vapor. With this in mind, scientists are eagerly searching for liquid water in places other than Earth.
Detailed explanation-3: -Water has been a major driver of exploration of the solar system. Essential to the formation of all known life, evidence of stable liquid water elsewhere could indicate an environment beyond Earth that could sustain the formation of extraterrestrial life.
Detailed explanation-4: -Living organisms need water because it plays a vital role in the reactions taking place within organism’s cells and body. Water acts as a universal solvent, providing a medium for the chemical reactions to occur. Substances are also transported from one part of body to the other in the dissolved state.
Detailed explanation-5: -Everything in our body is transported from one part to the other in a dissolved form. Almost all the cellular processes take place in aqueous medium. In fact, all the reactions that take place within our body occur in the aqueous medium only. Hence, water is essential for life.
Detailed explanation-6: -Water is essential for life because: Water forms the major component of a living organism. It plays a vital role as all the metabolic processes required for growth and development requires a liquid medium. Most of the reactions occur when the substances are in the dissolved state.
Detailed explanation-7: -Scientists believe several moons within our solar system have significant subsurface liquid water deposits. Saturn’s moon Enceladus and Jupiter’s moon Europa are two examples. Both appear to have salty, liquid oceans covered with thick layers of ice at the surface.