Answer: (A) the answer is 8
Explanation:topaz on the scale is no 8, followed by corundum no 9 and then diamond which is the hardest on no 10
It is thigmotropism because it is not affected by gravity or light.
Answer: Point mutation is easily reversible, thus non-lethal
Explanation:
Point mutation is caused by exchange of a single nucleotide for another. These change is called
1) Transition (when a purine base substitute another purine base, or pyrimidine bases substitute each other)
2) Transversion (when a purine base substitute a pyrimidine base).
However, note that a point mutation can be easily reversed by another point mutation; so, the claim that a nucleotide difference in the Hsr12 gene caused the human disease is inaccurate
Ecosystems equilibrium is when populations of organisms in the ecosystem are balanced.
