Answer:
The correct answer is C. epigenetics
Explanation:
Epigenetics is the study of change in the phenotype that occurs not due to change in the DNA sequence but because of gene expression modification. So here we study the changes that occurred in phenotype, not in genotype.
DNA methylation, histone modification, etc can be responsible for the epigenetic changes in an organism. In DNA methylation, a methyl group or methyl cap is added to the DNA segment which prevents the expression of some genes.
The skin cell, brain cell, and muscle cells have the same DNA but due to epigenetic change(change in expression), they look different. So the correct answer is C. epigenetics.
Ash can be harmful to an environment. It mostly depends on how much ash there is though. If a volcano erupted such as Mt. St. Helen's then yes that can harm an environment. Ash can cover the sky and block out the sun for days before disappearing and that will affect the life of plants
Answer:
Helpful variations allow individuals to survive and reproduce better than members who lack these variations.
Answer:
Each cell in your body has DNA, but the DNA formation was influenced by your parents. Their genes formed your genes.