The mass of a proton is__ The mass of an electron is__
In a neutral atom the mujer of protons will be___ the number of electrons. The electrons cloud is composed of multiple energy shells/levels. The electrons in the outer most shell is called .

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Lactic acid and energy are produced in muscle cells during choose 1 aerobic respiration cellular respiration anaerobic respiration cellular division

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?