Which of these is a correct description of the relation? a) reaction rate remains unchanged with any temperature variation. b) reaction rate always reduces with an increase in temperature. c) reaction rate increases with a decrease in temperature. d) reaction rate is highest at a specific temperature.

Answer;

D) Reaction rate is highest at a specific temperature.

Explanation;

Reaction rates of a given chemical reaction increase as the temperature increases. The rate of reaction proceeds increasingly up to a certain specific temperature where the reaction is at optimal level.

The explanation for the increased rate of reaction would be; increasing temperature increases the kinetic energies of molecules. The rapid movement of  molecules results to more frequent collision of these molecules and with higher energy, leading to increased rates of reaction.

a- all cells come from pre-existing cells