Presentation on theme: "TAKS Objective 3 Bio (4c,d): Viruses vs. Cell structure, viral diseases; bacteria (digestion, disease)"— Presentation transcript:
TAKS Objective 3 Bio (4c,d): Viruses vs. Cell structure, viral diseases; bacteria (digestion, disease)
Viruses: What they are NOT: 1. Living 2. A bacterium 3. Killed by antibiotics
VIRUSES : not strictly alive… nor is it strictly dead 1. Have DNA or RNA which allows it to make copies of itself. 2. Must be inside a living cell of some kind before the information can be used – reproduce.
BACTERIA: the 3 basic shapes (Kingdom: Eubacteria)
All bacteria are prokaryotes NO nucleus, chromosomes, or membrane-bound organelles members of either the kingdom Archaebacteria Eubacteria.
Some bacteria are parasites. Parasitic bacteria cause many diseases. They can be killed by antibiotics. Ex. streptococcus, diphtheria Leprosy - rod-shaped bacillus Tooth plaque magnified...
HELPFUL BACTERIA: Because yogurt is cultured, it is easier to digest than regular milk. Additionally, the bacteria in yogurt produce B vitamins in the intestine. Each spoonful of yogurt can contain some 10 million live, lactic-acid-producing bacteria.
Bacteria: Health, Helpfulness & Disease TAKS example questionS:
Bio (7a, b): changes in species, natural selection (fossils record, common ancestry) Natural Selection: Individuals that have physical or behavioral traits that better suit their environment are more likely to survive and will reproduce more successfully than those that do not have such traits. Evolution: The process of change over time.