It can date back as far as the dinosaur age...
Answer:
Using statistics!
Explanation:
If the predecessors had genetically transmitted disease,or specific features,the family tree is useful in identification and better understanding.
Answer:
They have homologous structures because they have a common ancestor.
<span> The answer is a misense mutation. In this case, the substitution of the tryosine amino acid with cysteine in the same position in the sequence does not affect the polypeptide becasue both tryosine and cysteine are polar animo acids. If the substitution </span><span><span> in the polypeptide chain </span>was by amino acids with different properties, it would affect the folding of the protein and change its conformation hence also affect its function. </span>
Food, water, warmth, sunlight...
