Transport of a compound across a cell membrane (down a concentration gradient) was measured at several concentrations. The presence or absence of ATP had no effect on the transport of this compound. ... Why are the lipid bilayers in cells called "selectively permeable"? They are permeable to some substances but not others.
Flagellum is primarily a motility organelle that enables
movement and chemotaxis. Bacteria can have one
flagellum or several, and they can be either polar (one or
several flagella at one spot) or peritrichous (several
flagella all over the bacterium).
A war, a spreading disease like a plague, or natural disasters.
I have no idea I’m sorry!!
Shrublands are a unique biome named for the many aromatic, semi-woody shrubs that thrive there. For instance, xeric, or desert scrublands, are hot and dry, with little rainfall.
