Chapter 15 (2) Flashcards
What were the earliest microbes found?
Prokaryotes
Of the 4 stages in the origin of life, which of the following is the highest stage of development
Pre-cell
A)pre cell
B)abiotic monomers
C)abiotic polymers
D)self replicating molecules
Features of prokaryotic cells
No nucleus
Most are unicellular
Some have endospores
Branch of prokaryotes
Bacteria and archaea
Where do you find archaea
In areas of extreme environments
Nasty areas
Spherical shaped bacteria
Cocci
Rod shaped bacteria
Bacilli
Spiral shaped bacteria
Spirochete
Exotoxins
Poisons secreted by a cell
Outside the cell
Bioremediation are used
Treating raw sewage
Cleaning rocks and beaches
Cleaning toxic waste dumps
Protists
The first eukaryotes to evolve from prokaryotes
Bad bacteria
Anthrax, bubonic plague,salmonella, tuberculosis, botulism, and biological weapons
Spontaneous generation
Life could come from non living matter
Biogenesis
Life comes from life.
4 stages hypotheses
Abiotic(non living) monomers
Abiotic synthesis of polymers
Self replicating molecules
Pre cells
Abiotic(non living) monomers
Syntheses of organic monomers such as amino acids, nucleotides
Abiotic synthesis of polymers
Monomers link together to produce polymers: proteins and nuclei acids
Self replicating molecules
DNA and RNA, making inheritance possible
Pre cells
Molecular packages within membranes, with some properties of life
Photoautrophs
Photosynthetic (plants only)
Don’t need to eat anything to produce energy
Photoheterotrophs
Use light to generate ATP, obtains carbon in organic form
We need to eat stuff to produce energy
Endotoxins
Chemicals in cell wall of the bacteria (inside the cell)
Bioremediation is
Organisms used to remove pollution from the water, air and the soil
2 theories of protists
Inward folding of outer membrane
And
Endosymbiosis other living organisms make their way into the cell to help each other
