The origins of life on earth has been because of chemical evolution . It can be justified by the statement.

Options

A. Meteorities falling on earth have been found to contain a number of laevorotatory amino acid as are found in living beings .
B. Torrential rains falling on earth for year brought `N_2 , CH_4, NH_3, CO_2, H_2 ` etc. into sea water where they reacted in presence of UV rays to form Sugars , Purines , Amino acids , Pyrimidines etc.
C. Every organism is special creation of god, hence there is no scope for evolution of one form of life from another
D. Frothind appeared in nutirent broth kept in open after some days of sterilization ,while no fronthing appeared in closed jar

Answer

**Step-by-Step Text Solution:**

1. **Understanding Chemical Evolution**: The origins of life on Earth can be explained through the concept of chemical evolution, which posits that life arose from simple chemical compounds through a series of reactions over time.

2. **Meteorite Evidence**: One piece of evidence supporting chemical evolution is the discovery of levorotatory amino acids in meteorites. These amino acids are similar to those found in living organisms, suggesting that the building blocks of life may have originated from extraterrestrial sources.

3. **Role of Early Earth Conditions**: The conditions on early Earth were conducive to chemical evolution. Torrential rains brought essential elements such as nitrogen, methane, ammonia, carbon dioxide, and hydrogen into the oceans. These elements created a rich environment for chemical reactions.

4. **Formation of Organic Compounds**: In the presence of ultraviolet (UV) radiation, these simple inorganic molecules reacted to form more complex organic compounds, including sugars, purines, amino acids, and pyrimidines. This process illustrates how life could have emerged from non-living chemical substances.

5. **Chemogeny Theory**: This process is explained by the theory of Chemogeny, which suggests that high temperatures and radiation on early Earth facilitated the formation of simple inorganic molecules that eventually led to the creation of complex organic molecules.

6. **Distinction from Other Theories**: It is important to differentiate chemical evolution from other theories of life's origins. For instance, the theory of biogenesis states that life arises from pre-existing life, while the theory of special creation suggests a divine origin. These theories do not support the concept of chemical evolution.

7. **Conclusion**: Based on the evidence and explanations provided, it can be concluded that the origin of life on Earth is justified by the process of chemical evolution, particularly through the reactions that occurred in the early oceans due to the influx of various gases and the influence of UV radiation.

**Final Answer**: The origin of life on Earth has been because of chemical evolution, justified by the statement that torrential rains brought essential gases into seawater, leading to the formation of organic compounds.

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