Specialised cells - tissue - organs - organ systems/organisms
Answer:
When respiration occurs without oxygen, lactic acid is produced. Answer is A.
Answer:
it is a prokaryotic plant cell, bc of the cell wall.
Explanation:
They move waste and nutrients through the intestines.
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
