{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Week 9 discussion - far away from the external environment...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Why so small? I believe that cells are so small because we need many different kinds of cells (like liver cells, skin cells, etc.) and because of the need for diffusion. If we were made up of only one huge cell, there would be no diffusion between cells, no way to take in nutrients or eliminate waste. We need lots of different kinds of cells in our bodies in order for them to operate properly. There must be white blood cells to fight infection; there must also different types of cells to make up the different organs in the body. If we were just one huge cell, we would be like a giant amoeba. This would mean that a portion of our cell would be far away from the external environment and not able to absorb nutrients or expel waste easily. This would answer the question as to why amoeba are so small, so that no one part of them is too
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: far away from the external environment. Prokaryotic cells are smaller than eukaryotic cells, I believe, because they do not contain the organelles that eukaryotes do and their DNA is not contained in a nucleus. The nucleus is very large inside of a cell. I believe that a unicellular organism is more complex even if they do not have all of the organelles that a cell from a multicellular organism has. I believe this is true because the unicellular organism has no other cells to rely one but itself. It must carry out all of its functions without the benefit of having other cells around to aid it. If something goes wrong, the cell has no one to fall back on and my die from one mistake. In order to sustain life on a unicellular lever, the cell must be tough and strong enough to do everything on its own....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern