Lecture 25 - protists II (SI) Flashcards Preview

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Flashcards in Lecture 25 - protists II (SI) Deck (37):
1

Alveolates

-unicellular with subcellular cavities
-classified with molecular systematics

2

Alveolates subgroups

1. Dinoflagellates
2. Apicomplexans
3. Ciliates

3

Rhizaria

Use pseudopodia to move and feed

4

Rhizaria subgroups

1. Radiolarians
2. Forams
3. Heliozoa

5

Stramenopiles

-fine hairlike projections on the flagella (mostly in reproductive cells)
-both heterotrophs and autotrophs in this group

6

Stramenopiles subgroups

1. Oomycetes
2. Brown algae
3. Diatoms
4. Golden algae
5. Heterokonts

7

Archaeplastida

-contains land plants, their ancestors, and relatives

8

Archaeplastida subgroups

1. Charophytes
2. Rhodophyta
3. Chlorophytes

9

Amoebozoans of Unikont

Bridge between unicellular and multicellular

10

Amoebozoans of Unikont subgroups

1. Slime molds
2. Rhizopods
3. Cellular slime molds

11

Opisthokonts of Unikonts

Group that connects protists with animals

12

Opisthokonts of Unikonts

1. Choanoflagellates

13

What are cilia used for in ciliates?

feeding and motion

14

Micro vs Macro nuclei in ciliates

micro (used for reproduction)
macro (used for day to day function and metabolism)

15

What happens during reproduction of Ciliates?

-micronuclei swapped between two ciliates
-fuse together after conjugation
-mitosis to produce new macro-nucleus, binary fission, 4 daughter cells
E

16

What is an example of Ciliates

paramecium

17

What are 4 characteristics of Diatoms?

1. unicelluular
2. asexual division with sexual phase (size issue)
3. wall made silica
4. responsible for 50% of photosynthesis in ocean

18

What is the shoebox concept?

asexual smaller part of the cell reproduces and makes second copy of the smaller size

19

Where are brown algae common?

temperate waters with lots of nutrients

20

What do brown algae create?

kelp forests using floats to raise blades to surface

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Are brown algae uni or multicellular?

unicellular

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How do brown algae reproduce?

alterations by generations

23

examples of brown algae

-bull kelp
-giant kelp

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3 characteristics of golden algae

1. biflagellate
2. some are mixotrophic
3. unicellular (mostly

25

4 characteristics of Forams

1. multi-chamber, porous shells made of calcium CaCO3
2. abundant in plankton
3. fossilize easiliy
4. for symbiosis with algae

26

2 characteristics of Heliozoa

1. fused siliceous or chitinous plates
2. live in freshwater

27

3 characteristics of Radiolarian

1. mostly actinpods
2. have pseudopodia that extend out of pores
3. siliceous skeletons accumulate in ocean floor

28

3 characteristics of Oomecytes

1. extensive SA
2. fine network of coenocytic hyphae
3. water molds, white rusts, downy mildews

29

3 characteristics of Rhizopoda

1. pseudopodia to feed + move
2. free living heterotrophs
3. Entamoeba histolytica, causes amoeboid dysentery

30

What are Mycentozoa

slime molds or fungus animals

31

3 characterisitics of Mycentozoa

1. bridge gap between unicellularity + multicellularity
2. plasmodial slime molds
3. cellular slime mold

32

What does a cellular slime mold form when food is scarce?

slug

33

What is the primary life stage of cellular slime mold?

haploid

34

4 characteristics of Rhodophyta

1. No flagellated stage
2. red color = phycoerythrin
3. most common seaweeds in warm coastal waters of tropical oceans
4. formed by endosymbiosis

35

What are 2 species of green algae?

1. chlorophytes
2. charophytes

36

What are the 3 forms of green algae

1. colonies of individual cells (volvox)
2. multinucleate filaments (Caulerpa)
3. formation of true multicellular forms by cell division/differentiation (Ulva)

37

2 characteristics of Choanoflagellates

1. link to sponges
2. exist as single cells or huge colonies