Scroll down for more information about life science
In our class we constructed many labs and a few projects during this unit. I have some of them listed below. As well as a link to coggle that will take you to an additional page that will give some more information about the life science unit.
DNA strawberry extraction First we froze ethanol in a freezer. Then we took the strawberries (with no green leaves on it still,) and put them in a plastic bag, (making sure that it is airtight). We smashed them for about two minutes. In the bag was also is the DNA extraction liquid. Then we filtered the strawberry liquid, to make sure all of the seeds are out. Then tilting the bottle (with the strawberry liquid,) at a 45 degree angle. Then we pored in the ethanol into the cup. Between the ethanol layer and the strawberry, it was bubbling. This bubbling layer then floats to the top. This bubbling layer is the strawberry's DNA. We then took a stick and pulled out the DNA to take a closer look at it. - The DNA's role is to be stored in the chromosomes and give cells direction. - DNA is found in the cells nucleus. We are able to view the DNA in the strawberry because we used a breaking down DNA solution and ethanol. -The structure in animals and plants overall looks the same. - All living things contain DNA. |
Diversity in a populationIn this lab, we had 30 beads of each color, (green, blue, red,and yellow,), on the habitat map. The beads stand for organisms, and the "organisms" blended in, or camouflaged in with the habitat maps. We had "hunters" that had 10 seconds to grab as many beads as they can. However, they can only grab one bead at a time. This model represented how a certain allele or trait in a population may not benefit the organism as well as other traits. So there is a decline of that trait in the population or species. However, there are always faults when it comes to models. this model did not show how there is also a decline in a certain trait from natural death, not just from predators. |