Bacteria and Viruses

                                   Bacteria are the smallest forms of life and the smiplest of living things.

Most species of bacteria are one of three different shapes:

Bacteria structures

Gram-negative & Gram-positive

Streptococcus pneumonia

E. coli

Energy

How do bacteria reproduce?

Conjugation

Helpful bacteria

More Bacterial Helps:

Harmful bacteria

Harmful bacteria controlled:

Bacterial Diseases:

Why is pasteurization effective in preventing bacterial contamination?

Why is it important to finish the entire course of antibiotics prescribed by a physician?

Name several processes that prevent or slow down food spoilage:

Can antibiotics kill viruses?

Viruses are simpler in structure than bacteria.

Viruses are small particles consisting of a nucleic acid core surrounded by a protein coat.

Viruses have genetic materials and can evolve, but are not considered living because they are not made of cells, cannot use energy, and can reproduce only when inside living cells.

Viruses reproduce by invading a host cell where new virus particles are assembled.

Viruses cause many diseases, including:

The Ebola virus, known as Ebola Hemmorrhagic Fever, is one of the deadliest diseases known to humans.

Vaccinations can protect an individual against viral diseases.