Monday, November 29, 2010

Plant and Animal Cells

        Oh my God. I'm so scared. We're locked in a room. HELP! We're at Shreiner Academy. SOS! In a room. The only locked room. Call the SWAT team. Break down the door and get us out. Our teachers are crazy! Our animal cells are in danger. The plant cells aren't. Lucky plant cells.
        Oh, false alarm. Well, not really. They did take us, but it was for good reasons. Anyway, we're supposed to be learning about plant and animal cells. They may look different, but they're the same in some ways. And they're different in some ways. Let's start with the similarities first.
        Plant and animal cells are both eukaryotic. This means that that they both have proper nucleus. They both have mitochondria, a nucleus, Golgi apparatus, cytoplasm, endoplasmic reticulum(smooth and rough), ribosomes, and so on. They are both living, obviously, and they both need food.
        Now, the differences. Plant cells have a cell wall as well as a cell membrane while animal cells have only a cell membrane. Both animal cells and plant cells need food, yes, but the difference is that plant cells can make their own food with photosynthesis. Plant cells have something called chloroplast which is what conducts photosynthesis. They also produce chlorophyll, which makes the plant green. The shape is different, too. A plant cell is rectangular(fixed shape), and an animal cell is round(irregular shape). Lysosomes are in animal cells, in the cytoplasm. They're not usually evident in plant cells, though.
         Ever wonder why leaves change color? Well, whether you like it or not, you're going to learn  about it. Okay, I told you about chlorophyll, right? Well, during the winter, the leaves go into hibernation, so the leaf does not produce chlorophyll or photosynthesis. It lives off of the food it has stored. Since the leaf does not produce chlorophyll, the leaf does not turn green. Leaves survive during the spring and summer, and dies during the fall and winter. Which means they have very short lives. Poor leaves.
        Well, that wraps it up for today. If you want to know more, again, simply go to youngro-jalenguy or SuperSara's blogs. Well, until next time!
P.S. Here's a picture of an animal cell:

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