Examining Live Organisms Flashcards
1
Q
What are two ways to observe live organisms?
A
hanging drop and wet mount
2
Q
How do you make a wet mount?
A
drop of culture on a slide, place cover slip over
3
Q
What are the three advantages of a wet mount?
A
- fast 2. cheap 3. disposable
4
Q
What is the disadvantage of a wet mount?
A
it dries fast so it cannot be observed for long periods of time
5
Q
How do you make a hanging drop?
A
- place a drop of culture on an inverted cover lip 2. place the depression slide over the cover slip with a petroleum jelly seal
6
Q
What advantage does a hanging drop have?
A
does not dry out quickly so it can be observed for long periods of time
7
Q
What are the two disadvantages of a hanging drop?
A
- special slide is used so it is expensive 2. labor intensive
8
Q
What is motility?
A
self directed movement of an organism via flagella, cilia or pseudopods
9
Q
What is Brownian motion?
A
vibrational motion caused by water molecules with microorganisms
