Study your flashcards anywhere!
Download the official Cram app for free >
- Shuffle
Toggle OnToggle Off
- Alphabetize
Toggle OnToggle Off
- Front First
Toggle OnToggle Off
- Both Sides
Toggle OnToggle Off
- Read
Toggle OnToggle Off
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
A key: Read text to speech.a key
41 Cards in this Set
- Front
- Back
Characteristics of bacteria
|
smallest, simplest, most abundant organism on planet
moves, eats, reproduces: carries out life functuions live almost everywhere Prokaryotic cell: no nucleus and no membrane-bound organelles,has ribosomes, some have chloroplasts (producers) live alone or in groups called colonies |
|
aerobic
|
needs oxygen
|
|
anaerobic
|
doesn't need oxygen
|
|
ways bacteria are helpful
|
Vitamin K: helps blood clot
Antibiotics: kill bacteria Digestion fuel: methane-producing bacteria insulin: helps people with diabetes Food:Many foods are made w/ bacteria Oxygen: produced as a waste product Vaccines: help our body prepare to fight diseases |
|
nitrogen-fixing bacteria
|
plants need nitrogen to grow, and bacteria supplies the nitrogen.
|
|
how some bacteria can cause human disease
|
by producing toxins (poisonous substances)
|
|
bacteria
|
smallest living organism, microscopic
|
|
Unicellular
|
one-celled organism
|
|
prokariotic
|
no nucleus, simple structures, no organelles except ribosomes
|
|
consumer
|
cannot produce its own food
|
|
Flagella
|
whiplike tails that help bacteria move
|
|
fission
|
asexual form of bacterial reproduction
|
|
antibiotics
|
kill bacteria
|
|
pathogen
|
anything that causes disease
|
|
parasite
|
invades the bodyof another organism to take its nutrients
|
|
Flagella
|
whiplike tails that help bacteria move
|
|
fission
|
asexual form of bacterial reproduction
|
|
antibiotics
|
kill bacteria
|
|
pathogen
|
anything that causes disease
|
|
parasite
|
invades the bodyof another organism to take its nutrients
|
|
toxins
|
poisonous substances
|
|
vaccines
|
prevent some diseases caused by bacteria
|
|
Bacilli
|
rod-shaped bacteria
|
|
Cocci
|
sphere-shaped bacteria
|
|
Spirilla
|
spiral-shaped bacteria
|
|
Binary Fission
|
simplest form of asexual reproduction
- simple cell division -- 1 cell splits into 2 identical cells -results in new cell with same DNA |
|
4 steps of Binary Fission
|
1. cell grows
2. DNA copies itself 3. Cell begins to split & DNA moves to side 4. 2 identical cells |
|
Producer Bacteria
|
make their own food
contain clorophyll example: cyanobacteria |
|
Consumer Bacteria
|
have to get food by being parasite or decomposer
|
|
Decomposer Bacteria
|
break down dead or decaying organisms
|
|
Parasitic Bacteria
|
go into body of host and take host's nutrients
|
|
Eubacteria
|
Ex. Cyanobacteria (producer Eubacteria)
produce oxygen as waste product important food source for other organisms |
|
Archaebacteria
|
Bacteria that live in extreme conditions (produce methane)
|
|
Too many Eubacteria
|
cause too much to bloom
|
|
What do good bacteria do for the environment?
|
Bioremediation - change pollutants into harmless compounds
Recycling Bacteria - decomposers - decompose dead or decaying organic matter and creates nutrients for the earth |
|
Pathogens enter body
|
inhale, eat or through cut or scab
|
|
Bad bacteria can cause
|
Lyme disease, cavities, strep throat, food poisoning, pneumonia
|
|
Pathogens make you sick by:
|
producing toxins
|
|
Pasteurization
|
invented by Louis Pasteur
Heat food to a temperature that kills most of the harmful bacteria but doesn't change the taste much |
|
Treatment of bacterial diseases
|
Vaccines - prevent some diseases
- made from damaged bacteria cell parts or dead bacteria - once enters your body, makes white blood cells recognize the bacteria as "bad", when bacteria enters the body, white blood cells will attack |
|
nodules
|
growths on roots of plants where nitrogen fixing bacteria live
|