can a mature b cell produce an epitope-specific antibody first and then switch to make an antibody against a different epitope?

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

Environmental impacts on evolution : mastery test