Lec 4 - Protists

Question 1

Clade
Archaeplastids

Answer 1

red algae & green
algae
* Contains non-protist
Plant Kingdom too
* (know the clade and
the two groups)

Question 2

Red Algae

Answer 2

Most multi-cellular
found in warm marine waters
Phycoerythrin pigments

Question 3

Coralline algae

Answer 3

lay down calcium carbonate
– Reef-builders
– food for marine life

Question 4

Stramenopiles- Diatoms

Answer 4

Unicellular – pennate or centric
* Glass-like wall
– Protection
– pores exchange materials with environment
-Most abundant photosynthetic organism in
oceans and lakes
* ~1/5 of O2 production
* Important in aquatic food webs

Question 5

Plasmodium

Answer 5

Causes malaria
lives inside of vertebrate animal host liver and blood cells
changes surface proteins

Vectored by Anopholes mosquitoes

Question 6

Ciliates

Answer 6

use cilia for locomotion and feeding
fast-moving
Most predators on bacteria or small protists
Paramecium

Question 7

Dinoflagellates

Answer 7

secondary endosymbiosis of red alga
many are mixotrophic
Photosynthetic symbionts of coral

Question 8

cilia

Answer 8

Cilia create currents, move prey into oral groove
Forms food vacuole
Fuses with lysosomes (contain digestive enzymes)
Intracellular digestion

Question 9

Euglena, Euglenozoans

Answer 9

Eyespot = stigma
* blocks photoreceptor at base of flagella

Question 10

Subclade Amoebozoans

Answer 10

Contains protists groups
* Amoebas
* Slime molds
Lobe-shaped pseudopods
* Moves very slowly – cytoplasmic streaming
* Creates new psuedopods

Question 11

Group Amoebas
* genus Amoeba

Answer 11

Many predatory
Some parasitic (amoeboid
dysentery)

Amoebas live in fresh water
Contractile vacuole

many are predatory – engulf prey by phagocytosis
Forms food vacuole
Fuses with lysosomes (contain digestive enzymes)
Intracellular digestion

Question 12

Group Slime molds

Answer 12

soil, leaf mulch, rotting logs
brightly-colored, multinucleate plasmodium