The symbol is a warning sign at a petrol station. Which type of property of a material is the sign warning the customers about?

magnetic
chemical
mechanical
physical

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

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.

Ascientific idea becomes valid when it is what?