How does active transport differ from all other forms of transportation?

a. it shifts from high to low
b. it requires energy
c. it maintains homeostasis
d. it creates an equilibrium shift

The series of transgressions and regressions that produce cyclothems were likely produced by

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

The term equestrian relates to which animal? bulls cows horses pigs