Since it is exam week, this forum will focus on preparing for Exam 2. Any topic of the previous three weeks is open to discussion (remember, fungi will not be on Exam 2).
What concept was the hardest for you to wrap your head around so far? Explain to your classmates why you are struggling with this particular topic. The intent of this forum is to generate discussion on a variety of topics covered so far in the course, so the more descriptive you are in your troubles, the better your classmates can help you fill the holes in your understanding. You need not pick a topic that is unique to previous posts, but be sure to title your post in a way that your classmates can easily identify your chosen topic.
Look through your classmates discussions. Is there a topic you can help your fellow students with? Perhaps you found a great resource on the web that enhanced your understanding that you can share, or came up with a good study tool to develop your own understanding, or maybe it is a topic that you came into the class with an strong understanding. Share what you know and help your fellow classmates be successful on the exam!