Burning wood, it is a chemical reaction and the only option that actually changes the composition of the substance. The burnt would cannot change back into normal wood now
Euglena are part of the photosynthetic protist group.
If a substitution changes the amino acid to a “stop,” it's called a NONSENSE mutation. frameshift, missense, silent or nonsense (hint: deletion or insertion will always be frameshift). Sickel cell anemia is the result of a type of mutation in the gene that codes for part of the hemoglobin molecule.
