Explain how bioregional economics applies to greater resource productivity.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Number and variety of living organism; includes genetic, species, and ecological types

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?