Download Asexual Reproduction

Cells arise only from preexisting cells
In 1858, German physician Rudolf Virchow stated an important
biological principle:
“Where a cell exists, there must have been a preexisting cell.”
Cells come from cells.
Another way of saying reproduction of cells is cell division
ROLE OF CELL DIVISION IN THE LIVES OF ORGANISMS:
1. Reproduces an entire organism (unicellular organisms like amoeba and
paramecium)
2. Cell division is the basis of sperm and egg for sexually reproducing
organisms.
3. Cell division also enables sexually reproducing organisms to develop from a
single cell (fertilized egg, or zygote) into and adult organism.
4. Cell division continues to function in renewal and repair (replacing cells that
die from normal wear)
Prokaryotes - Asexual Reproduction
In asexual reproduction, each offspring has exactly the same hereditary information as its
parents. They are all nearly identical to each other and to the parent. Asexual reproduction
results in the ________ _________________ within a species from one generation to the
next.
BINARY FISSION –
Bacteria – do not have a nucleus.
1. chromosome attaches to the cell membrane.
2. chromosome replicates
3. cell wall forms between the chromosomes and its copy.
4. Cell wall divides the cell into two daughter cells.
**If the cells do not completely separate they will form chains of bacteria**