PLEASE HELP, 50 points what elements on the periodic table are helpful in some ways but still toxic?

Number and variety of living organisms includes genetic, species, and ecological types

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what