Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
Answer:
The following are some pros and cons for badger control to stop bovine tuberculosis
Explanation:
Pros
1. culling showed significant decrease the occurrence of the disease in herds
2. The reduction in disease has been great economic help for farmers as the treatment is very expensive if the cows are tested positive.
cons
1. disrupted the ecosystem by targeting and killing badgers.
2. The policies and control methods are not cost efficient. they are high maintenance.