Which of the following lowers the activation energy of a reaction?
a) catalyst
b) lipids
c) carbohydrates
d) reaction

According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

Nucleic acid certain protein cell membranes certain carbohydrates

What is turgor pressure, what causes it, and what does it do for a plant?