Ch_21_Protist_Evolution_and_Diversity Flashcards Preview

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1

Protists Domain and Kingdom

Eukarya
Protista

2

Protos Greek

first

3

most protists are unicellular, except this kind

algae

4

what type of "trophs" are protists

Heterotrophs, Autotrophs, Mixotrophs

5

Endosymbiosis

several eukaryotic organelles originated as symbiotic relationship with other single-celled organisms

6

possible origin of mitochrondria

ingestion of aerobic bacterium

7

possible origin of chloroplast

ingestion of cyanobacteria

8

evidence mitochondria/chloroplast originated from prokaryotes

similar:
structure,
size,
reproduction,
biochemistry,
genetic makeup

9

paraphyletic

no apparent common ancestor with all lineage in the same group

10

number of protist super-groups

6

11

supergroup

taxonomic group between Domain and Kingdom
attempts to create an inclusive lineage

12

T/F Generally Protists prefer moist environments

T

13

Amoeboid movement

psuedopodia extend and engulf

14

psuedo Greek

fake

15

pod Greek

foot

16

Protist movement

1) psuedopodia (Amoeboid)
2) Flagella
3) Cilia
4) slime excretion and glide (diatoms, malaria)

17

long rotating organelle used for protist movement

flagella

18

short hair-like organelles that move in unison for protist movement

cilia

19

Protist nutrient acquisition

Heterotrophic
Autotrophic
Mixotropic

20

How to group Protists

1) Movement
2) nutrient acquisition

21

Alternation of Generations Introduction Concept

2 different life stages
diploid (2 n)
haploid (n)

22

Alternation of Generations flow (start at spores)

spores(n) -> mitosis -> gametophyte -> gametes -> fusion -> zygote (2n) -> sporophyte -> miosis -> spores

23

Protist Supergroups

Archaeplastida
Chromalveolata
Excavata
Amoebozoa

24

Archaeplastida traits

contain plastids for photosynthesis
photosynthetic organisms

25

Archaeaplastids

can think of as chloroplasts
derived from cyano-bacteria

26

Groups of Archaeplastida

Green Algae
Red Algae
Land Plants

27

Green Algae locations

ocean
freshwater habititats
snowbanks
moist land

28

Green Algae traits

photo-synthesizers
group of Archaeplastida
bottom of ocean food chain
major contributor to atmospheric Oxygen
most are unicellular

29

filamentous Green Algae

Spirogyra

30

colonial Green Algae

Volvox