Download Kingdom Bacteria - Effingham County Schools

Kingdom Bacteria
(Eubacteria)
Bacteria are more helpful
than harmful!
Kingdom Bacteria
bacteria – a large group of microscopic onecelled organisms that sometimes cause
disease
Reproduction of Bacteria
Binary Fission – a type of asexual
reproduction
where one organism divides into two organisms
How?...
-The one main (circular)
chromosome makes a
copy of itself
-Then it divides into two
bacteria
Reproduction of Bacteria
BINARY FISSION
Bacteria dividing
Completed
Bacterial Cell &
Nucleiod DNA Ring
DNA replication
Cell wall synthesis
Cell separation
How Are They Classified?
•
Bacteria are classified based on how they obtain energy
(get food):
1) Consumers (heterotrophs) - get their energy from other
organisms (parasite or decomposer)
-parasites – organisms that feed on living things
-decomposers - get food from breaking down dead
matter into simple chemicals
**(Bacteria are the #1 decomposer)
2) Producers (autotrophs)- bacteria that make their own
food through photosynthesis
Shapes of Bacteria
• Scientists often classify
bacteria by their shape:
– Spiral-shaped- (Spirilla)
occur in single strands
– Rod-Shaped – (Bacilli)
may occur singly or in
chains
– Round-shaped – (Cocci)
may occur singly or in
pairs, chains, or clusters
How Do They Get Energy?
• Producers and Consumers (Parasite or Decomposer)
• Bacteria use osmosis and diffusion
in order to take in water & nutrients so they can grow and
divide, as well as make the materials needed to survive.
• Osmosis – the movement of water through a membrane
from an area of higher concentration to an area of lower
concentration
• Diffusion – the tendency of a substance to move from an
area of higher concentration to an area of lower
concentration
Where Are They Found?
• Bacteria are found everywhere – they can
be beneficial or harmful
Good for the Environment
• Life as we know it could not exist without
bacteria!!
• Nitrogen-fixing bacteria consume nitrogen and
change it into a form that plants can use.
• Nature’s recyclers- decomposers
(Dead material/Waste would never decompose)
• Bioremediation-bacteria is used to clean up oil
spills
Good for People
• Scientists can genetically engineer bacteria for
many purposes, including the production of
medicines, insecticides, cleaners, adhesives,
foods, etc.
• Bacteria are used to make antibiotics to fight
other bacteria.
• Insulin- Bacteria is used to help to make insulin
• Digestion-inside your gut
Feeding Time
• Every time you eat cheese, yogurt,
buttermilk, or sour cream, you also eat a
lot of lactic-acid bacteria
• The lactic acid acts as a preservative and
adds flavor to the food
Harmful Bacteria
• Pathogenic bacteria cause diseases
• Pathogenic bacteria invade a host
organism and obtain nutrients from the
host’s cells (parasite)
• Bacterial Diseases: tooth decay,
ulcers, strep throat, food poisoning,
Lyme disease, Bubonic plague
Scientists believe that Archea
and Bacteria are the oldest
forms of life on earth!!!!
• BrainPOP | Bacteria