Answer: Membrane transport proteins are specific and selective for the molecules they move, and they often use energy to catalyze passage. Also, these proteins transport some nutrients against the concentration gradient, which requires additional energy.
Explanation:
Answer:
Ur welcome ;) (Even tho I uploaded it from the web lol)
Explanation:
See if any of the organisms lived before the others by measuring the age
of their fossils using some means, like radioactive dating.
Well a characteristic is something that's distinctive about that person for example a characteristic of that person is nervously chewing on his/her lip where as a trait is inherited
