The antibiotic, penicillin, kills a certain type of disease-causing bacteria. Recently, however, a new strain of this bacteria was found that survives in the presence of
penicillin. What is the most likely explanation for this?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Any sound above what db can cause hearing loss in human beings