______ of species is a reflection of their evolutionary relationships.
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Equus Caballus is the scientific name of _________.
A difference between 2 longitudes at equator is nearby equivalent to _____ km.
The outermost layer of sun is called
The maintenance functions of living organisms are performed by the _____.
What is the process of waste water treatment is commonly known?
Growing agricultural crops between rows of planted trees is known as
Which of the following is not a commercial source of energy?