Download Section 3.1 - Cell Division Cell division occurs in all organisms

Section 3.1 - Cell Division
Cell division occurs in all organisms.
Unicellular organisms reproduce through
organisms, cell division is involved in
, and
.
,
. In multicellular
,
Most growth multicellular organisms occur when
The genetic material of eukaryotic cells is organized in chromosomes.
When a cell divides into
new cells, each new cell receives a full set of
. The genetic material in cells is contained
DNA stands for
. DNA is a chemical that
contains information for an organism's
and
. DNA is
made up of
strands of
joined in a structure that resembles a
or
.
In eukaryotic cell, most of the cell's DNA is in the
of a cell's life cycle, DNA exists how?
. During most
DNA is wrapped around proteins in like thread around a spool and compacted into
structures called
. Within each species of organism, the number of
chromosomes is
_. Humans have
chromosomes.
Cell division is involved in growth, development, and repair.
Multicellular organisms vary greatly in
and
Cell division is essential for three major functions.
.
.
Through cell division, a single cell becomes
cells. Those two cells then
divide into
, and the four then divide into
, and so on. An
organism grows because
. Cell division is
always
. As an organisms grows the number of cells
Name the two ways individual cell size is limited:
DNA is a cell remains
.
Why do multicellular organisms not end up in the shape of a spheres?
Give two examples of specialized cells:
,
The human body is made up of
different types of cells. Cells are replaced
at different
. Every minute your skin loses
cells, which are
replaced with
. The cells in your brain
and do not
very often.
SECTION
CELL DIVISION OCCURS IN ALL ORGANISMS. '
Organisms grow, reproduce, and maintain themselves through
cell division.
KEY CONCEPT Cell division occurs in all organisms.
1. Cell division is involved In many functions. You know that you grow because
your cells produce more cells. Do you think more cell division occurs in the body
of a young person or an older person? Explain.
2. The genetic material of eykaryotic ceils is organized ii
The genetic material of a cell is DNA. Before a eukaryotic cell divides, its DNA
condenses into chromosomes. Add labels to the drawing below: centromere,
chromatids, chromosome, DNA, nucleus, proteins.
eukaryotic cell
c.
-E.
J
Cell dSavosiora as involved an growth, development, arsd repair. Complete the chart
below by describing how cell division makes growth, development, and repair possible.
Growth
Development
Repair
CELLS AND MICROBIOLOGY, CHAPTER 3, REINFORCING KEY CONCEPTS
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