Viruses & Bacteria Mr. Skirbst Life Science Topic 10.

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Presentation transcript:

Viruses & Bacteria Mr. Skirbst Life Science Topic 10

Kingdom Monera

Collecting Bacteria 1.They are all around us, all the time! 2.Some are dangerous! Be careful. 3.To be observed, we need a colony. 4.We can incubate them in agar. 5.They need to be sealed shut. 6.They can drown in their own waste 7.Store them upside down.

Collecting Bacteria

Kingdom Monera Single-celled organism that lacks a nucleus

Kingdom Monera Single-celled organism that lacks a nucleus Moneran = bacteria

Typical Structure cytoplasm hereditary material flagella capsule cell wall cell membrane

Typical Structure Endospore – “inside seed” - some bacteria have this with hereditary material

Bacterial Shapes Cocci – spherical Bacilli – rod Spirili – spiral

Life Functions Autotroph

Life Functions Autotroph – makes own food * plant-like * produces oxygen (O 2 )

Life Functions Heterotroph

Life Functions Heterotroph – can’t make own food

Life Functions Heterotroph – can’t make own food * parasite (live off a host) * decomposer (live off dead / decaying matter)

Life Functions Helpful Produce O 2 Digest food Antibiotics

Life Functions Helpful Produce O 2 Digest food Antibiotics Harmful Cause disease (strep, Lyme’s, Plague) Break down asphalt

Viruses

-Tiny particles that invade living cells

Viruses -Tiny particles that invade living cells -Do NOT perform functions of living cells (are not living)

Viruses -Tiny particles that invade living cells -Do NOT perform functions of living cells (are not living) -Need a host to reproduce

Size of Viruses

-Measured in nanometers (billionths of a meter) (much smaller than cells)

Structure of Viruses

1.Outer coat of protein (provides protection)

Structure of Viruses 1.Outer coat of protein (provides protection) 2.Inner core of hereditary material (controls “reproduction”)

Reproduction of Viruses

1.Attaches to host cell

Reproduction of Viruses 1.Attaches to host cell 2.Injects hereditary material

Reproduction of Viruses 1.Attaches to host cell 2.Injects hereditary material 3.Controls cell functions

Reproduction of Viruses 1.Attaches to host cell 2.Injects hereditary material 3.Controls cell functions 4.Reproduces inside cell

Reproduction of Viruses 1.Attaches to host cell 2.Injects hereditary material 3.Controls cell functions 4.Reproduces inside cell 5.Explodes cell and spreads

Reproduction of Viruses

Ants In Cars Race Everywhere