Once the threshold voltage triggers an action potential, what causes action potentials to be generated? a. lons channels are opened and positive ions diffuse into the cell.
b. lons channels are opened and negative ions diffuse into the cell.
c. lons channels are opened and positive ions diffuse out of the cell.
d. lons channels are opened and negative ions diffuse out of the cell.​

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound

What type of pollution does household garbage cause