Explain two ecological services provided by fungi in the ecosystem and provide two specific examples of how other organisms are helped by their presence.

What is the difference between a saturated and an unsaturated fatty acid? Which would you find in olive oil?
Which would you find in butter? 7. What are the parts of one triglyceride? 8. What happens to protein structure
when proteins are denatured? leotide?

The purpose of aseptic technique is to control the conditions of the work environment so that sterile media remain that way until inoculated deliberately by the lab worker (you). The two tubes represent the "before" and “after" results when this is accomplished — a sterile medium is inoculated and grows to produce a pure culture of the unknown organism. List three precautions taken in the wet lab to reduce accidental and unwanted inoculation (also known as “contamination") of sterile media.

The alteration of an atom for the Share of a covalent bond For 14. Explain the difference between a nonpolar covalent bond and a polar covalent bond. 15. Make an electron distribution diagram of water. Which element is most electronegative? Why is water considered a polar molecule? Label the regions that are more positive or more negative. (This is a very important concept. Spend some time with this one!) 16. What bonds connect the atoms of hydrogen and oxygen in a molecule of water? 17. What bonds enable a gecko to climb a wall? May Chapter 2: Chemical Context of Life W

Explain the differences between an ion pump and a channel protein (e.g. aquaporin). Specifically, what are their functions and what type of transport do they use?  Answers longer than four sentences will automatically only receive half credit.