Answer:
Zebra mussels are spread from one body of water to another by natural flow, carried on the feathers or feet of birds, or by humans in bait buckets or on boats.
Answer:
why was the discovery of pencillin important?
Penicillin discovery came as a result of the plague that rages St Mary's hospital in 1928, the discovery by a man called Alexandra Fleming which drastically reduce the death rate. Penicillin is an antibiotics that is gotten from mould and it has different strains/species
Explanation:
Answer:
Avoid using killed vaccine for administration.
Explanation:
Bruton's agammaglobulinemia may be defined as the X linked disorder that affects the immune system of an individual. This disease is mainly caused by the mutation in the gene responsible for coding the Bruton tyrosine kinase.
The children suffering from this disease require special immunization and some precaution must be followed before immunizing them. These patients are not allowed to immunizes with the live vaccines as these vaccines can evoke the immune response strongly and child may get infected by the disease. The individual should not given immunosuppressive drugs or corticosteroids.
Thus, the answer is avoid using killed vaccine for administration.
It is the comparison of the nucleotide sequences in DNA
