Active transport requires energy when moving molecules against a concentration agent. It requires for specific membrane transport proteins. Only a certain type of protein can move a certain type of substance.
The three main types of Active Transport are:
1) Sodium-Potassium Pump
2) Endocytosis
<span>3) Exocytosis </span>
Educate Your Friends, Colleagues, and Families on the Global Goals
The awnser is the last one
Human reproductive cloning should not now be practiced. It is dangerous and likely to fail.