What is a phospholipid composed of?

a. a nonpolar head and a polar tail
b. a nonpolar head and tail
c. a polar head and a nonpolar tail
d. a polar head and tail

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.

During an investigation of an xss attack, the investigator comes across the term "[a-za-z0-9\%]+" in analyzed evidence details. what is the expression used for?

All organisms contribute some water to the water cycle by conducting