6.4.2 Protozoa

Question 1

Are Protozoa eukaryotic or prokaryotic?

Answer 1

Eukaryotic (genetic information: chromosomes in nuclear membrane)

Question 2

Are protozoa motile

Answer 2

Yes

Question 3

How can protozoa locomote?

Answer 3

Cilia

Pseudopodia

Glide

Flagellum

Question 4

Discuss the nutrition and digestion of protozoa:

Answer 4

Pinocytosis (fluid droplets) and phagocytosis (larger particles)

Question 5

How do protozoa reproduce?

Answer 5

Asexual - binary fission and schizogony and sporogony

Sexual - sporozoa

Sometimes both

Question 6

what does homoxenous and heteroxenous and facultatively heteroxenous mean?

Answer 6

Homoxenus - single host species during its life cycle (direct)

Heteroxenous - multiple hosts during its life cycle (indirect)

Facultative heterogenous - may be more than one host but not required

Question 7

Breifly describe the coccidian life cycle (protozoa)

Answer 7

host eats oocyst

oocyst breaks down to release sporoziotes

asexual multiplication in intestines

schizont grows and ruptures

meroziote causes 2nd gen formation

sexual reproduction

microgametocyte ruptures (lumen) to fertilise macrogametocyte to form zygote

oocyst formed > sprogomny > sporocyst

sporocyst is infective when ingested.