The answer to you problem is Wooden pencils can last longer than mechanical pencils
The following statements describes examples of facilitated diffusion:
1. It requires concentration gradient.
2. It requires the assistance of protein carriers.
Facilitated diffusion refers to the movement of molecules into the cell with the help of carrier proteins. It is a passive form of movement.<span />
Answer:
Ural
Explanation:
It begins in Russia and continues in Asia.
Answer:
Each pollinator uses flowers with specific characteristics as its niche.
Explanation: