Kingdom Protista Flashcards
1
Q
1st eukaryotic organism in fossil was found _____
A
1.5 BYA
2
Q
Endosymbiont Hypothesis
A
- Lynn Margulis
- Chloroplasts and Mitochondria originated as separate prokaryotic organisms that were taken inside a primordial eukaryotic cell
3
Q
Algae have _____ species
A
25,000
4
Q
Algal Life Cycle
A
- Sporophyte (multicellular 2N) produces spores
- Spores are unicellular (N)
- Spores germinate to produce gametophytes
- Gametophytes are multicellular (N)
- Gametophytes produce gametes
- Gametes are unicellular (N)
- Two gametes join (N+N) = 2N (zygote)
- Zygote becomes a sporophyte
5
Q
Phylum Chloryphyta
A
= Green Algae [17,000 species] - Freshwater moss - Marine - Pigments: clorophyll A & B - Store food as starch (in plastids) - cellulose common as cell wall material * Probably ancestor to land plants
6
Q
Unicellular representatives of Green Algae
A
- Chlorella
- Dunaliella
- Chlamydomonas
7
Q
Chlorella
A
- Live in hollow hair of sloths [green algae]
8
Q
Dunaliella
A
- Source of beta-carotene [green algae]
9
Q
Chlamydomonas
A
- Common in freshwater [green algae]
*Chlamydomonas nivalis [snow]
- red, yellow, green
- carotenoids warm up algae by sun
- photosynthesize in snow
(phlagellum help move it back up to top of snow)
10
Q
Multicellular Green Algae
A
- Filamentous Forms
- spirogyra - Thallose Forms
- Ulva: flat sheets - Colonial Forms
- Volvox, Hydrodictyon
11
Q
Classes of Phylum Chromophyta
A
- Class Phaeophycae: Brown Algae
- Class Bascillariophycae: Diatoms
- chlorophyll a & c
12
Q
Qualities of Phaeophyceae
A
- chlorophyll a & c
- 1500 species
- temperate
- kelp
-rockweeds
*Food: laminarian starch
SX: walls made up of algin [alginic acid] - type: laminaria (sea tangles)
13
Q
Types of Brown Algae
A
- Macrocystis pyfera: Giant Kelp
[In temperate waters] = grows 0.5 meters/day
14
Q
SX of Kelp
A
- Lamina
- Pneumatocyst
- Stipe
- Holdfast
15
Q
Class Bacillariophycae
A
[diatoms] - Golden Algae - chlorophyll a & c - 6,000 to 10,000 species - pigement: fucoxanthin - diatoms [ diatomaceous earth == filters (swimming pools)]