Small opening in the epidermis of a leaf called guard cells allow water and other materials to enter and exit the leaf. true or false ?

What is the value of keq for the reaction expressed in scientific notation

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is a metal replacement reaction