During a "leap year" we add an extra day to our calendar because:
A. The Earth takes 24 hours to rotate
B. The moon takes 27.3 days to orbit
C. Earth takes 365.5 days to revolve
D. The moon takes 29.5 days to orbit

Npiranha, fish with large teeth represent the dominant trait. because the dominant trait masks the recessive trait, in a population of 1,000 piranhas, all with large teeth, we could expect about the next generation of fish to have small teeth.