Microbiology Diversity Flashcards
(44 cards)
Humans have over ___ trillion microbes residing in and on the body. Microbes outnumber human cells in what ratio?
100
3:1
What two types of bacteria does gram staining categorize into?
Gram Positive - Bacteria have much thicker cell walls, holding the dye in better (purple)
Gram Negative - Bacteria have much thinner cell walls, allowing the dye to leak (pink)
Using the MacConkey agar, does E.coli produce lactose? is it gram negative or positive?
It does produce lactose as it is red
It is gram negative
Branches shift depending on the genomes sequences used
tree of life
Gene sequencing is the main method used today to determines. Before it was mutations
relatedness between organisms
The most common fungi is ______
yeast
coccus means
spherical
Why are archaea hard to study
They leave in extreme places, are small, and are hard to find
We have never found an archaea that casues ______ in humans
disease
Mycology is the study of what?
Fungi
Hyphae and chitin makes fungi
distinct
A virus is an infectios agent that has RNA or DNA as it’s core
ds
How many bacteria can be in one teaspoon of fertile soil?
100 million to 1 billion
Microbes have also been found through the Earth’s _________, up to _ miles above ground
troposphere, 9
How can bacteria in the sky influence the weather?
Nucleating ice crystal formations and forming ran drops that eventually bring the bacteria back down to the ground
How do microbes in Antarctica stay alive?
They scavenge hydrogen, carbon monoxide, and carbon dioxide form the air
Researchers found almost ______ different bacteria living under 800 meters of ice in the west Antarctic
4000
Marine microbes make up to __ to __% of the ocean’s biomass
70, 90
______ _______ perform most of the world’s oxygen and also aid the in global cycling of carbon, nitrogen, phosphorous, and other nutrients
Marine microbes
Where can most microbes in humans be found?
Skin, hair, respiratory system, and digestive tract
How can microbes aid or harm humans?
Some help with digestion
Some causes lung infections or creates plaque on teeth
Where can microbes be found?
Almost every environment on Earth
Microbes can be both ______ and _________
prokaryotes, eukaryotes
Which kingdoms have microbes?
Bacteria, archaea, protists, fungi, and sometimes viruses
There are also some microscopic animals
