How would more secondary consumers affect the biomass of the higher trophic levels?

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

What causes darkening of the skin as melanin production increases

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?