In terms of human evolution, the sagittal crest was usually more pronounced and larger in older and robust species compared to younger or gracile species. 
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Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution while Artificial selection is Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.
 
        
             
        
        
        
Answer: To be produced by meiosis
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Glucose serves as a major source of energy for metabolic processes in mammalian cells. Since polar molecules cannot be transported across the plasma membrane, carrier proteins called glucosse transporters are needed for cellular uptake.
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