Bread vs. Water

Topics: Mitosis, Cancer, Cell cycle Pages: 2 (329 words) Published: May 4, 2014
Gabrielle
Morgan


Living
Environment
Period
7

03
–
06
–
14

Mrs.
Lombardi


Page
319
–
332

Do
16
–
20,
Page
337



16)






17)
Interphase
–
Growth
of
the
cell
and
replication
of
its
genetic
material
 Prophase
–
Nuclear
membrane
breaks
downs;
chromosomes
become
visible.
 Metaphase
–
Spindle
fibers
appear;
chromosomes
line
up
across
the
middle
of
the
 cell.


Anaphase
–
Double
–
stranded
chromosomes
separate,
identical
chromatids
move
 apart.

Telophase
–
Chromatids
move
to
opposite
ends;
nuclear
membranes
reappear;
cell
 pinches
in.


18)
A
giant
ameba
isn’t
possible
because
before
any
one
–
celled
organism
gets
 anywhere
near
that
big
it
undergoes
mitosis.
The
product
is
a
smaller
version
of
the
 parent
cell.



19) Cancer

is the disease caused by an uncontrolled division of abnormal cells in a part of the body. Several chemicals and environmental toxins are responsible for changes in

normal cellular DNA. Substances that cause DNA mutations are known as mutagens, and mutagens that cause cancers are known as carcinogens.
Particular substances have been linked to specific types of cancer. Tobacco smoking is associated with many forms of cancer, and causes 90% of lung cancer. Similarly, prolonged exposure to asbestos fibers is associated with mesothelioma. Ways to reduce the risk of cancer is to eat fruits and vegetables, don’t smoke, limit fat in diet, and maintain a healthy weight.

20) By using asexual reproduction they can ensure that the plant's characteristics will be preserved. Some specialty plants are hybrids that will not breed true, will not reproduce well sexually, or will not reproduce at all sexually. Also asexual methods of reproduction can often produce saleable plants faster (for example, cuttings are large enough to sell much earlier than seedlings are). Finally, grafting is not quite a method of asexual reproduction, but is closely related to reproduction from cuttings. 
...
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