1. in an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. the fifty-first generation emerged with normal-length wings. this observation would tend to disprove the idea that evolution is based on. a) inheritance of natural variations. b) inheritance of acquired characteristics . c) natural selection. d). survival of the fittest 2. charles darwin called the ability of an organism to survive and reproduce in its specific environment. a)diversity. b)fitness. c) adaption. d) evolution

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.