Lipids are not polymers because they contain one molecule and are not macromolecules.
Answer:
Hmmm i tied between A and C because they both seem correct but since C sounds a little off ima say A
Explanation:
Rigid skeletons are formed from materials including chitin (in arthropods), calcium compounds such as calcium carbonate (in stony corals and mollusks) and silicate (for diatoms and radiolarians).
Hey there..
If I'm correct the guidelines are: reuse, reduce and recycle.
Hope it helps :)