Active transport proteins have one key distinguishing feature, which is that they use to move a substance against its concentration gradient.

Chemical energy

Active transport proteins have one key distinguishing feature, which is that they use chemical energy to move a substance against its concentration gradient.

Chemical energy is the ability of a chemical substance to be subjected to changes through a chemical reaction in order to change other chemical substances.  

Active transport proteins are proteins that transport substances such as small molecules, or another protein against its concentration gradient. Active transport proteins require chemical energy and they change their shape when they bind with the cell’s fuel (ATP molecule).

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.