Final answer:
The statement that Alu sequences are found in all mammals is false, as they are specific to primates. These sequences, along with DNA sequences, provide evidence of evolutionary relationships and common ancestry among organisms.
Step-by-step explanation:
Alu sequences are short interspersed elements (SINES) found in the genomes of primates, including all humans. These sequences are a part of a class of genetic elements known as retrotransposons, which can copy themselves and insert into new locations in the genome. Because Alu sequences are highly repeated and have a unique number and distribution in individuals, they are useful in DNA fingerprinting. While common in primates, not all mammals have Alu sequences; therefore, the statement that Alu sequences are found in all mammals is False.
The fact that DNA sequences are more similar in more closely related organisms is evidence of evolutionary relationships and common ancestry. When comparing the protein sequence of cytochrome c among different primates, the similarity suggests a close evolutionary relationship. The identical sequence in chimpanzees and humans implies a very recent common ancestor, while the one amino acid difference in rhesus monkeys indicates a more distant, yet still close, relationship.
Lastly, for questions related to genetic matters such as the foundations of the genetic code, evolutionary relationships, and genetic diversity, it is crucial to recognize the shared ancestry of living organisms. This notion underlines the idea that if something is discovered to be true for one organism, such as E. coli, it may also hold for another organism, like elephants, due to the conservation of biological processes over evolutionary time.