Lab 3 Microbiology Live Microscopy

To increase the density of microorganisms in a water sample you can

• prepare a hay infusion

• perform a hanging drop

• add agar to the sample

• mix the sample vigorously

What is not present in protozoa?

• cell wall

• flagella

• contracile vacuole

• nucleus

Tags

NGSS.MS-LS1-2

The protozoa in this picture is categorized as a ________________ because it moves using _________________ that surround it.

• Ciliate - cilia

• Flagellate - Flagella

• Pseudopodia- psuedopods

• Sporozoans - spores

A long whip like structure used for movement by organisms

• Flagella

• Pseudopods

• Cilia

• pili

Tiny (short) hair-like structures uses for movement and gathering food by eukaryotic organisms

• Flagella

• Pseudopods

• Cilia

• fimbrae

When observing a water sample you see a one celled organism with a nucleus. This tells you the organism is NOT

• Bacteria

• Protozoa

• algae

• it is not any of the organisms listed

When observing a water sample with the 10X objective you see an organism with a nucleus and many green organelles inside that you suspect are chloroplasts. The organism also appears to have a cell wall. Therefore, this organism is most likely

• fungi

• protozoa

• algae

• bacteria

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

NGSS.MS-LS1-6

When using the 40X objective you see bacteria moving back and forth in a vibrating type of motion. The bacteria are likely moving due to

• flagella

• cilia

• Brownian movement

• pseudopods

If you see bacteria move across the field of view in a water sample, then the bacteria is likely moving due to

• cilia

• flagella

• Brownian movement

• fimbrae

When viewing microorganisms in unstained water samples

• you will want the condensor at the highest point

• you want as much light as possible

• you will adjust the light to increase contrast

• you should open the iris diaphragm as far as possible