a). In both unicellular and multicellular organisms the purpose of cell division is growth, maintenance and reproduction. in unicellular organisms like bacteria, the cell division takes place by mitosis to produce two idential daughter cells. In multicellular organisms the all the cells except the gametes undergo mitosis to produce daughter cells that look like parent cells. The cells undergoing mitosis also maintain same number of chromosomes similar to parent cells. The gemetes undergo meiosis or reduction division to produce half number of chromosomes from each parent cell and when both male and female gametes fuse, they produce complete set of chromosomes. b). Cells becoming old or cells undergoing damage require replacement of cells by cell division. The age of cell and any changes causing damage in cells determine the occurrance of cell division in both the prokaryotes and eukaryotes. c). The prokaryotes have small genomes and may contain less than 500 to more than 5000 genes. The bacteria have a small circular chromosome and show specific variation with other bacterial species. The bacteria contain extra chromosomal circular DNA called a plasmid. The plasmid is capable of replicating on its own and often carries the non essential genes that can be transferred from one cell to another. The bacterial genes are organized in to clusters known as operons that can be transferred at a time. The genes of the operons contain protein encoding gene as well as regulatory sequences. The prokaryotes are single celled organism whereas the eukaryotes are multi cellular. The eukaryotic genomes are large in size than the prokaryotes and may range 10 MB to over 100,000MB. Prokaryotes contain a single chromosome and eukaryotes contain several. The eukaryotic genes exhibit special characteristics like presence of non-coding or intervening sequences or introns and repetitive sequences that are responsible for large genome size in eukaryotes. d). In unicellular organisms like bacteria, the cell division takes place by mitosis to produce two idential daughter cells. In multicellular organisms the all the cells except the gametes undergo mitosis to produce daughter cells that look like parent cells. The cells undergoing mitosis also maintain same number of chromosomes similar to parent cells. The gemetes undergo meiosis or reduction division to produce half number of chromosomes from each parent cell and when both male and female gametes fuse, they produce complete set of chromosomes. Solution a). In both unicellular and multicellular organisms the purpose of cell division is growth, maintenance and reproduction. in unicellular organisms like bacteria, the cell division takes place by mitosis to produce two idential daughter cells. In multicellular organisms the all the cells except the gametes undergo mitosis to produce daughter cells that look like parent cells. The cells undergoing mitosis also maintain same number of chromosomes similar to parent cells. Th.

1. a). In both unicellular and multicellular organisms the purpose of cell division is growth,
maintenance and reproduction. in unicellular organisms like bacteria, the cell division takes place
by mitosis to produce two idential daughter cells. In multicellular organisms the all the cells
except the gametes undergo mitosis to produce daughter cells that look like parent cells. The
cells undergoing mitosis also maintain same number of chromosomes similar to parent cells. The
gemetes undergo meiosis or reduction division to produce half number of chromosomes from
each parent cell and when both male and female gametes fuse, they produce complete set of
chromosomes.
b). Cells becoming old or cells undergoing damage require replacement of cells by cell division.
The age of cell and any changes causing damage in cells determine the occurrance of cell
division in both the prokaryotes and eukaryotes.
c). The prokaryotes have small genomes and may contain less than 500 to more than 5000 genes.
The bacteria have a small circular chromosome and show specific variation with other bacterial
species. The bacteria contain extra chromosomal circular DNA called a plasmid. The plasmid is
capable of replicating on its own and often carries the non essential genes that can be transferred
from one cell to another. The bacterial genes are organized in to clusters known as operons that
can be transferred at a time. The genes of the operons contain protein encoding gene as well as
regulatory sequences.
The prokaryotes are single celled organism whereas the eukaryotes are multi cellular. The
eukaryotic genomes are large in size than the prokaryotes and may range 10 MB to over
100,000MB. Prokaryotes contain a single chromosome and eukaryotes contain several. The
eukaryotic genes exhibit special characteristics like presence of non-coding or intervening
sequences or introns and repetitive sequences that are responsible for large genome size in
eukaryotes.
d). In unicellular organisms like bacteria, the cell division takes place by mitosis to produce two
idential daughter cells. In multicellular organisms the all the cells except the gametes undergo
mitosis to produce daughter cells that look like parent cells. The cells undergoing mitosis also
maintain same number of chromosomes similar to parent cells. The gemetes undergo meiosis or
reduction division to produce half number of chromosomes from each parent cell and when both
male and female gametes fuse, they produce complete set of chromosomes.
Solution
a). In both unicellular and multicellular organisms the purpose of cell division is growth,
maintenance and reproduction. in unicellular organisms like bacteria, the cell division takes place

2. by mitosis to produce two idential daughter cells. In multicellular organisms the all the cells
except the gametes undergo mitosis to produce daughter cells that look like parent cells. The
cells undergoing mitosis also maintain same number of chromosomes similar to parent cells. The
gemetes undergo meiosis or reduction division to produce half number of chromosomes from
each parent cell and when both male and female gametes fuse, they produce complete set of
chromosomes.
b). Cells becoming old or cells undergoing damage require replacement of cells by cell division.
The age of cell and any changes causing damage in cells determine the occurrance of cell
division in both the prokaryotes and eukaryotes.
c). The prokaryotes have small genomes and may contain less than 500 to more than 5000 genes.
The bacteria have a small circular chromosome and show specific variation with other bacterial
species. The bacteria contain extra chromosomal circular DNA called a plasmid. The plasmid is
capable of replicating on its own and often carries the non essential genes that can be transferred
from one cell to another. The bacterial genes are organized in to clusters known as operons that
can be transferred at a time. The genes of the operons contain protein encoding gene as well as
regulatory sequences.
The prokaryotes are single celled organism whereas the eukaryotes are multi cellular. The
eukaryotic genomes are large in size than the prokaryotes and may range 10 MB to over
100,000MB. Prokaryotes contain a single chromosome and eukaryotes contain several. The
eukaryotic genes exhibit special characteristics like presence of non-coding or intervening
sequences or introns and repetitive sequences that are responsible for large genome size in
eukaryotes.
d). In unicellular organisms like bacteria, the cell division takes place by mitosis to produce two
idential daughter cells. In multicellular organisms the all the cells except the gametes undergo
mitosis to produce daughter cells that look like parent cells. The cells undergoing mitosis also
maintain same number of chromosomes similar to parent cells. The gemetes undergo meiosis or
reduction division to produce half number of chromosomes from each parent cell and when both
male and female gametes fuse, they produce complete set of chromosomes.