Llamas
They were there to protect the Celts ! and use for food
they use train
horse + carage
swords
endocytosis
Active transport requires the use of ATP because in active transport things move against the concentration gradient. Usually there is a protien pump (which is a form of a transport protien) that does this.
car obviously and private jet
Vikings medicine
yes yes
Active transport requires cells to spend energy, usually in the form of ATP
Cavalry regiments are mounted horsemen.