Domains of Life

1
Domains of Life
Prokaryotes and eukaryotes
nucleus
Three Domains of Life
Prokaryotes
1. Archaea
2. Bacteria
Eukaryotes
3. Eukarya

• Protista

• Plants

• Fungi

• Animals

Bonobos
2
Domains of Life
1. Archaea (-um)
Prokaryotes
Extremophiles
autotrophs
3
2.Bacteria (-um)
Escherichia coli (E.coli)
Staphylococcus aureus

• pathogen

Resistance and Natural Selection
4
2. Bacteria (-um)
Inside bacteria cells
ubiquitous
loopy
(cell membrane)
Autotrophs self-feeders they make their own
carbohydrates
Heterotrophs feed on others get carbohydrates
from others
5
Binary Fission- prokaryotes
6
Questions
In which of the following environments would you
most likely find an archaeum? a. on the leaf of
a tree b. on a table top c. inside of a
volcano d. in a dogs mouth

• Which of the following is NOT a feature of
  bacteria?
• One loopy strand of DNA
• DNA housed in a nucleus
• Reproduces asexually
• Could be an autotroph or heterotroph

7
3. Eukarya
Fungi
Protista
Animalia
Plantae
8
Protista (multiple kingdoms)
Single celled nucleus
Autotrophs and heterotrophs
Intracellular parasites
Malaria
Malaria infection cycle
Two hosts
Symptoms
9
Fungi
Cell wall
Spores
Extracellular digestion
Filamentous growth
Hypha(e)
10
Human Pathogens

• Yeast infection

Candida albicans

• Cradle cap

• Thrush

Penicillium
Pneumonia
Athletes foot
Ringworm
Heterotrophs
11
Plants
Light Energy
PS
6CO2
6H2O
C6H12O6
6O2
Autotrophs
12
Animals
No cell walls
Heterotrophs
13
Questions
Which of the following contains no
autotrophs? a. fungi b. plants c. protista d.
bacteria e. more than one of these
Which is a difference between prokaryotes and
eukaryotes? a. prokaryotes dont have DNA
eukaryotes do b. prokaryotes dont grow or
reproduce eukaryotes do c. prokaryotes have a
nucleus eukaryotes dont d. eukaryotes have a
nucleus prokaryotes dont
What can autotrophs do that heterotrophs cannot
do? a. maintain homeostasis b. move from one
place to another without any aid c. produce
carbon dioxide d. make their own carbohydrates
14
Viruses
15
Viruses Infection
protein coat
viral DNA or RNA
Infect more cells
Living or non-living?
16
questions
Which of the following is a reason why viruses
are considered non-living? a. they cant be
killed b. they dont have a nucleus c. they
dont have DNA d. they dont metabolize
Of the following, which is the best treatment for
a viral infection? a. antibiotics b. get rest
and drink liquids c. run a marathon d. eat lots
of chocolate and watch Oprah
17
Cell Biology in the News

• Uses of PGD
• detecting single gene disease
• detecting multifactorial diseases
• sex selection

18
questions
What is the controversy over PGD? a. it can be
used to detect lethal genetic disorders b. it
can be used to detect multifactorial genetic
disorders c. it can be used to detect the sex of
an embryo d. more than one of these is
controversial

• What is your position on the use of PGD?
• It should not be used under any circumstances
• It should be used only to detect lethal genetic
  disorders
• It should be used only to detect lethal genetic
  disorders and multifactorial
• genetic disorders, but not sex selection
• d. There should be no restrictions on its use

19
The end