Science 9B

Question 0

How would you distinguish a large colonial organism from a multicellular organism?

Answer 0

If it can live on its own

Question 1

(True or False) Protozoans and algae are prokaryotic.

Answer 1

False. (theyre eukaryotic with membranes)

Question 2

Describe three ways protozoans can move. Give an example of a protozoan that uses each method.

Answer 2

flagella - Trypanosoma

cilia - paramecia

bulge - amoebas

Question 3

How do protozoans and algae differ?

Answer 3

Protozoans: they are more animal-like, they are consumers, they reproduce by asexual mitosis or sexual conjugation

algae: they are more plant-like, they are producers, they reproduce by fragmentation

Question 4

How does a euglena obtain energy?

Answer 4

By photosynthesis or by eating

Question 5

Describe one method of asexual reproduction and one method of sexual reproduction in protists.

Answer 5

Asexual: A colony of floating algae in the water performs mitosis. If something jumps in the water, FRAGMENTATION of colonies happens and a new colony begins

Sexual: Some protozoans can reproduce sexually. One type is conjugation; they join their oral grooves together and exchange their nuclear material. Then they separate.

Question 6

List three important functions that protists have.

Answer 6

1. They are food for larger animals like plankton in the ocean
2. Algae produces 70% of the worlds photosynthesis producing oxygen
3. Used in foods and products for humans

Question 7

Which organism causes malaria?
a. Trypanosoma

b. Amoeba
c. Spirogyra
d. Plasmodium

Answer 7

d. Plasmodium