What is the job of the cord

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

What does it mean for a cell membrane to be selectively permable

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?