Question

When a student observes a slide showing different stages of binary fission in Amoeba, he generally observesfour stages of the process. Describe these stages in a proper sequence

Answer 1

The Process of Binary Fission involves some steps:-

Step 1–  The bacterium cell firstly copy its DNA which is tightly coiled, so that the new cells will have DNA. This DNA includes all the information of the bacterium that needs an organism to survive. Therefore, it is important to copy it.

Step 2–  After copying the DNA structure, the bacterium starts to grow larger.  Increase in size will allow some separation between the two duplicated chromosomes, attached to the plasma membrane and are present inside the cell.

Step 3–  The distance created between two Chromosomes finally forms the division in the middle of the bacterium. And, eventually this division completely divides the bacterium in two halves. This whole process is known as cytokinesis.

Step 4– The two divided cell will now be called as daughter cell. Binary fission leads to develop two identical daughter cells.

Answer 2

Different four stages of binary fission in Amoeba observed by student:

The correct sequential orders of the stages are as follows:

Stage 1: Parent cell

• In this stage the student observes the parent amoeba with an prominent nucleus.

Stage 2: Division of the nucleus

• The nucleus present at the center starts to elongate and divides.  

Stage 3: Cytoplasm division

• Once the nucleus has completed elongated and splitted into two, the cytoplasm initiates to divide by constriction.  

Stage 4: Production of daughter cells

• After the completion of constriction of cytoplasm it ends up in the production of two individual daughter cells.