The answer is B because class of drugs known as expectorants.
Homologous or sister chromatids
Answer:
Coral reefs are under threat if atmospheric carbon dioxide levels continue to rise, new research has shown. When CO2 dissolves in the ocean, it raises the water's acidity level. This prevents a build up of calcium carbonate, which corals draw from seawater to build their skeleton
Explanation:
C. bb because the white allele is recessive
