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FISH 205 > PROTISTA/PROTOZOA > Flashcards

Flashcards in PROTISTA/PROTOZOA Deck (21)
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1
Q

Protist

A

unicellular or multicellular without specialized tissues. This simple cellular organization distinguishes them from other eukaryotes, such as fungi, animals and plants

2
Q

eukaryote

A

membrane-bound organelles

3
Q

who discovered protists. what year

A

Van Leeuwenhoek. 1674

4
Q

who suggested placing non-plants and non-animals into protista?

A

Haeckel 1870.

5
Q

Proto-zoa = ? Gr.

A

very first animal

6
Q

defining characteristics of protozoa

A

-unicellular eukaryotes
-lacking cell walls of:
collagen
chiton
-non-photosynthetic in the primitive condition

7
Q

name differences between protozoa and animalia (metazoan)

A
  • both are eukaryotes
  • protozoans are unicellular
  • protozoans never develop from a blastula embryonic stage
  • animals arose from a flagellated protozoan
8
Q

what flagellated protozoan did animals arise from?

A

choanoflagellate

9
Q

what size are protozoa? (hard to see)

A

5-250 um

10
Q

how is the social/scientific impact large because of protozoa?

A
  • major roles in primary production and in decomposition
  • food
  • ailments
11
Q

name some ailments that are caused by protozoa

A
  • malaria (plasmodium)
  • african sleeping sickness (trypanosome)
  • dysentery
  • beaver fever (giardia)w
  • potato famine
12
Q

where do you find protozoa?

A
  • wherever there is moisture
  • in close association to other protists, other animals, or plants
  • as parasites or commensals
13
Q

name 3 characteristic of a protozoa

A
  • unicellular (but functions as a complete organism. i.e.: feed, digestion, locomotion, behaving, reproducing)
  • eukaryotes
  • motile
14
Q

how do protozoans digest?

A

intracellularily. digested particals become surrounded by a membrane, and expelled thru an opening in the plasma membrane

15
Q

protozoa are divided into how many supergroups?

A

five

16
Q

what are the groupings of convenience for protozoa? **

A
  • flagellates
  • ciliates
  • sporozoans
  • amoebas
17
Q

how do trypanosomes evade immune responses?

A

switching surface proteins

18
Q

what is the common name for trypanosomes?

A

african sleeping sickness

19
Q

what protozoan-infection requires both mosquitos and humans to complete its life cycle?

A

plasmodium

20
Q

how many ppl die from malaria every year

A

900,000

21
Q

REVIEW MOSQUITO LIFE HISTORY.

A

-dont need to know life history, but need to know
life in mosquito
life in human
resting stages