Micro Lecture 10 - The Protozoa

Question 1

Protozoans belong to Kingdom _______ and Domain ________.

Answer 1

Kingdom Protista and Domain Eukarya

Question 2

The word “protozoa” came from the [Greek, Latin] word “Protozoon”.

Answer 2

Greek

Question 3

“Protozoon” means __________.

Answer 3

“First animal”

Question 4

Protozoans are [unicellular, multicellular].

Answer 4

Unicellular

Question 5

Protozoans are [prokaryotic, eukaryotic].

Answer 5

Eukaryotic

Question 6

Protozoans are eukaryotes that lack cell wall.

True or False

Answer 6

True

Question 7

Protozoans are mostly heterotrophic and mostly free-living.

True or False

Answer 7

True

Question 8

All protozoans are heterotrophic.

True or False?

Answer 8

False. A few are parasitic / pathogenic protozoans that feed directly on host fluids or actively feed on tissues.

Question 9

The size range of protozoans.

Answer 9

3 - 300 micrometers

Question 10

It is the main limiting factor for survival of protozoans.

Answer 10

Water

Question 11

Example of a protozoan (and stage) that has a motile feeding stage.

Answer 11

Giardia - Trophozoite

Question 12

A large number of species of protozoans can form cyst.

True or False

Answer 12

True

Question 13

The _______ is the resting or dormant stage for protozoans where they have a protective membrane or a thickened cell wall.

Answer 13

Cyst

Question 14

_______ can survive adverse environmental conditions. They can also play a role in dispersal of the organism.

Answer 14

Cyst

Question 15

Methods of asexual reproduction of protozoans.

Answer 15

Mitotic cell division and Binary fission

Question 16

Asexual reproduction of parasitic protozoans.

Answer 16

Multiple fission

Question 17

Where does multiple fission occur?

Answer 17

Inside a host cell

Question 18

The sexual reproduction of protozoans.

Answer 18

Conjugation

Question 19

Protozoans are classified based on their __________.

Answer 19

Motility

Question 20

4 classification of protozoans based on motility

Answer 20

1. Flagellates
2. Sarcodina
3. Ciliates
4. Sporozoates

Question 21

____________ are protozoans that are non-motile.

Answer 21

Sporozoates

Question 22

__________ are protozoans that move through fine hair-like structure called cilia.

Answer 22

Ciliates.

Question 23

These are protozoans that move using the flagella or a tail-like structure.

Answer 23

Flagellates

Question 24

These are protozoans that move using pseudopodia or false feet.

Answer 24

Sarcodina