Answer:
A
Explanation:
D is not correct because the atmosphere doesn't expand, C isn't correct because the Sun doesn't heat all the Earth evenly (hence different climates), B is not correct because cold fronts can be singular, so it has to be A
So that the plant doesn't become extinct
Salt reduces the amount of water in a solution, because you're introducing another molecule. If the water concentrations are different, the water is going to want to reach an equilibrium to balance itself out. Because the salt solution has a higher water concentration than the plant cell, the water will move into the cell to try and balance out the concentrations. If the salt solution had a lower water concentration (water potential) then water would move from the cell into the solution.
AlCl3. Each negative is balanced with a positive. 3 chlorine to make the -3 charge to balance the +3 charge from aluminum.
Lactase an carbonic anhydride are examples of what type of substance is enzymes.
