A. Experiment 1: Developing a Hypothesis
Interpret the Results
1.The cytoplasm in the cut off foot got the information it needed to rebuild an entire
Acetabularia cell from the nucleus. The nucleus contains all of the DNA (genetic information) and can therefore control all other functions of the cell. It has ability to control growth and reproduction of a new cell based on the information stored in the nucleus. The cell will not change because the information in the nucleus is still there to reproduce another new cell.
2.In the cell’s foot, the function of the nucleus is to control the reproduction of a new cell
and to maintain and use the same genetic information as the first cell.
B. Experiment 2: Testing the Hypothesis
Interpret the Results
1.Yes, the results of Experiment 2 support our working hypothesis, because a new cell
identical to the first cell was created. This is because of the nucleus containing the same genetic information which allows a new identical cell to be created just from the stalk. It is the nucleus that controls the functions of the cell and allowed a new cap and foot to be created using the same DNA as the first.
The Essay on The kidney’s structure, functions, and what controls these functions
The kidney is made up of nephrons, which are a kidney’s functional units. These nephrons collect fluid filtered from the blood. The kidney connects to the renal artery, renal, vein, and ureter. Purified blood leaves the kidney using the renal vein, urine leaves using a ureter and the renal artery carries blood from the aorta to the kidney. The nephron has a cup-shaped nephric capsule that ...
2.The cytoplasm in the stalk got the information it needed to rebuild an entire cell from the
information contained in the nucleus.
3.When moved to a new location, it is obvious that the nucleus still performs the same
function as it regularly does-controls the actions of other functions in cell. It contains the same genetic information as in the first location and continues to regulate cell activity (growth/reproduction).
The chromosomes (DNA) do not change and the genetic information is still the same.
4.To perform all it’s life functions, the cell gets its information from the nucleus.
C. Experiment 3: Testing the Hypothesis Another Way
Predict the Results
Analyze
1.A) Yes, this result supports my original hypothesis because a new, identical cell was
created just using the information from the nucleus because of the identical DNA.
B) I can draw the conclusion that the genetic information remains identical and will therefore create the same cell as in the first picture despite the location of injection (and in what kind of cell).
C) The final conclusion I can draw at this point is that the nucleus has the ability to reproduce a new cell with the same genetic information (another Acetabularia cell), despite the type of cell it is injected into. The blue cell ( the petal-cap ) had it’s cap and foot removed and therefore did not have a nucleus to control the cell’s functions. When the umbrella cap-nucleus was injected, it then took over the functions of the cell. The chromosomes (DNA/genetic information)remained the same as in the umbrella cap cell; hence the reproduction of another umbrella cap cell. In order for a further final conclusion to be drawn, it would be of use to repeat this experiment using only the cap of the cell with a nucleus in order to prove that the nucleus can also reproduce/develop from just the cap.
2. If I did not observe the expected results, I would first b)-try experiment 3 again. I would repeat my procedure in experiment 3 again in order to establish that no mistakes were made and seek any flaws in course of experiment. Your results may not always be evident the very first time you conduct an experiment due to the possible inexperience or uncomfort with procedure. Therefore it may be necessary to repeat experiment to make sure you have done everything correctly and precisely in order to obtain accurate results.
The Term Paper on Stem Cell
Abstract There are several types of stem cells being used in stem cell research and therapy today. They are embryonic, adult and induced pluripotent stem cells. Each will be discussed further. This topic has stirred much moral, ethical and political debate as whether cells from fetuses should be used in this research. This impacts governmental policies on laws and funding. Another issue that must ...
