a) what are the dependent & independent variables?

an independent variable is a variable that we choose to change to see that happens. ( eg. the temperature when testing evaporation).

a dependent variable is the variable that we measure. ( so maybe how much water evaporates)

independent variable--can be controlled or manipulated.

dependent variable--is affected by changes made to the independent variable.

also important:

control variable (constant variable)--remains the same throughout the entire experiment.

Explanation:

not sure but try c two haploid cells

explanation:

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called