The answer is; A
This model hypothesizes how life started during the early conditions of the earth which were hot and filled with greenhouse gases in its atmosphere about 4 billion years ago. It is explained by the theory of spontaneous generation where organic molecules were created from inorganic molecules spurred from energy from lightning. These organic molecules filled the water bodies and chemically arranged themselves, over time, into primordial life.
I believe A. Nitrogen is the most abundant Gas.
A is yours answer I think
Answer:
TTAGCCATG
Explanation:
Adenine pairs with Thymine
Guanine pairs with Cytosine
Hope this helps!!
they are caused by mutation. the best example of it are human blood groups.