Why have researchers not found a one time vacanation for the flu

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human