4) The electrons of an atom. a- are found in the nucleus along with protons
b- Orbit the nucleus vanus energy levels
c- have a positive charge
d- are cittracted to the positive charge or neutron

Identify the examples in which sam interacts only with natural resources

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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?