Water temperature and pressure determine how far sound travels in the ocean. ... The whale produces sound waves that move like ripples in the water. As the whale's sound waves travel through the water, their speed decreases with increasing depth (as the temperature drops), causing the sound waves to refract downward.
Answer:
Cro-Magnon is a common name that has been used to describe the first early modern humans of the European Upper Paleolithic. Current scientific literature prefers the term European early modern humans, to the term 'Cro-Magnon,' which has no formal taxonomic status, as it refers neither to a species or subspecies nor to an archaeological phase or culture. The earliest known remains of Cro-Magnon-like humans are radiocarbon dated to 43,000 years before present. Cro-Magnons were robustly built and powerful. The body was generally heavy and solid with a strong musculature. The forehead was fairly straight rather than sloping like in Neanderthals, and with only slight browridges. The face was short and wide. The chin was prominent. The brain capacity was about 1,600 cubic centimetres, larger than the average for modern humans. However, recent research suggests that the physical dimensions of so-called "Cro-Magnon" are not sufficiently different from modern humans to warrant a separate designation.
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Protein, the building blocks of proteins are amino acids, different sequences and combinations of these amino acids result in huge numbers of proteins which have a variety of functions.
When the organism become bipedal, they walk with 2 legs so there are 2 arms that were unused. Some of them try to use that hand by grabbing stick or stone, leading to tools. They start to think more to develop tools and their brain capacity become increased.
The ability to use stone tools will help in food digestion since it can break the food easier. This reduces the needs for bigger teeth/jaw.