It is in the nature of the animal to act as how their biological parents did. Genetically something in the brain keeps the "tradition" ongoing.
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Answer ➜ Competition and lack of nutrition are probably the main reasons and according to Biologists, the reason Earth is not covered with bacteria is that conditions are not ripe for bacteria to develop.
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Classical Biotechnology methods include: Selective Breeding, hybridization, and induced mutations, and recombinant DNA.
F. curly hair is dominant
Since the air is a great thermal isolator, the windows prevent heat exchange better than one made out of a single thick sheet of glass. The air between the thin blankets is not moving around and will form an isolating layer that acts exactly like another blanket, thus improving the thermal isolation