In what direction do substances move across channel proteins in terms of concentration)?

High to low concentration

Explanation:

The process of substances moving across the cell membrane through channel proteins represents a type of diffusion called facilitated diffusion. This type of diffusion does not require energy intake, and for this reason, substances involved in facilitated diffusion always move from areas of high concentration to areas of low concentration, because going the opposite direction would require ATP (energy).

anti-human il13 stable cell line (lebrikizumab) can be provided from creative biolabs.

explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a