The fact that at least one species of resistant bacteria has developed for almost every antibiotic is evidence of which condition?
a. the bacteria have adapted and could be evolving into a different species.
b. the bacteria have learned to mimic other species.
c. there is no variation in the bacteria population.
d. the antibiotics are made differently.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.