Sharing Biology Class: Part II The Galls

 It's time for the second round of the Biology Class series!

This lab that my class and I did last fall had to do with a certain natural phenomenons called "galls."

What are galls you ask?

Galls are those swelled, green balls found on Goldenrod stems. For class the friday before lab that week, our homework was to go out and collect galls. They are most usually found in the giant gatherings of goldenrod (not on singular stalks in the middle of nowhere) and our job was to grab 'em, tag 'em and bag 'em. ....Ok, so tagging didn't happen but all of us brought in twenty or so galls that Monday morning for dissection.

Dissection you say? The whole reason that these galls are in existence is because of the parasitic Gall Fly and Gall Moth. These two insects spend their larval stage inside the galls. Eggs are laid inside the stem, and the gall forms as the eggs grow into maggots. The white plant tissue surrounding the maggot's little hideout serves as it's nutrition and protection (although one type of beetle can sometimes burrow into a gall and feast on the white grub within). Eventually, the maggots mature and emerge from the gall as adults to start the cycle all over.

Anyway, back to dissection. Our job was to take scalpels and cut open those galls. It was a relatively fun class, interuppted here and there by occational cheers along the lines of "Hey guys! I DIDN'T accidently cut through my grub this time!"  We basically had to measure the galls, count the ones that had maggots in them, and examine the inside nutritional tissue.

All in all, galls are pretty cool. The grubs aren't slimy and discusting (they're more like really, really short white earthworms) and I was happy to finally learn what the heck those swollen lumps were on the flowers.

** Thanks to http://www.gpnc.org/goldenro.htm and http://www.fcps.edu/islandcreekes/ecology/goldenrod_gall_fly.htm for helping me remember some information!

Sharing Biology Class: Part I

One of the most interesting classes I had last year was A.P. Biology. Yes, I know I wrote about how much it aggravated me, I still think it was pretty darn awesome. This series hopefully depicts the better times I had in the class.

Gross, I know, but that was the very beginning of my favorite class last year.

Our very first lab was studying the eating habits of slugs. This means that our homework that first Friday was to go out and collect at least five slugs, more for extra credit. Our rather large class of nine was successful in our searches for the slimy little critters. I grabbed an old, plastic ice cream tub to house my catches in and dubbed it "The Slug Pad." 

Only when I got to class that Monday did I realize how my seemingly triumphant 12 slugs paled in comparison to one of my lab partner's nearly 200. I thought it was cool that she could get so many! This picture above is only a fraction of her huge tub-full.The class gathered around to wince and gag as she uncovered the overcrowded box.

As class went on and we got through our lab papers, my two lab partners and I were put on Slug Duty as the little slimeballs kept escaping from their prison of plastic. Thank goodness for gloves!

At the end of the lab, a week later, we set our captives free. While dumping out The Slug Pad, I turned over a leaf to find a slug that had laid some eggs! Our class, being the cool kids that we were, turned her into the class pet, Bertha. We made sure to give her water as much as we could remember every day and even gave her a mini-terrarium to house her future babies.

Unfortunately, our beloved Bertha sadly dried out died from the change in surrounding atmosphere.

R.I.P. Bertha! You are sorely missed!