G.3 Plant-like Protists

Question 1

Euglena

Answer 1

Genus of a single cell flagellate eukaryotes - tiny green unicellular organisms that use flagellum to move and live in fresh water

Question 2

Eye spot

Answer 2

Heavily pigmented region in certain unicellular organisms that functions in light reception

Question 3

Contractile protein

Answer 3

Protein that’s capable of shortening

Question 4

Euglenoid movement

Answer 4

Crawling type movement by Euglena when there’s not enough water for swimming

Question 5

Algal bloom

Answer 5

Rapid increase in algae population of freshwater/ marine water systems

Question 6

Holdfasts

Answer 6

Root-like anchoring structure of algae

Question 7

Stipes

Answer 7

Stem-like structure of algae

Question 8

Blades

Answer 8

Photosynthetic structures of algae (analogous to leaves of a terrestrial plant)

Question 9

Dinoflagellate

Answer 9

Bearing two dissimilar flagella and having characteristics of both plants and animals

Question 10

Bioluminescent

Answer 10

Able to emit light (some dinoflagellates, specifically in Phylum Pyrrophta can do this)

Question 11

Diatoms

Answer 11

Common name for members of Phylum Chrysophyta

Question 12

Diatomaceous earth

Answer 12

Fine, particulate soil made from the cell wall deposits of diatoms

Question 13

Phycobilin

Answer 13

Water-soluble pigment found in red algae and Cyanobacteria (can absorb light)

Question 14

Fucoxanthin

Answer 14

Pigment molecule in brown algae which transfers sunlight energy into chlorophyll for photosynthesis

Question 15

Colonial

Answer 15

Living as a colony

Question 16

Filamentous

Answer 16

In the form of very long thin rods

Question 17

Thallus

Answer 17

An undifferentiated plant/ algal- like growth (i.e. Ulva)

Question 18

Chlamydomonas

Answer 18

Genus of green algae, consisting of around 150 species of unicellular flagellates which have eyespots

Question 19

Volvox

Answer 19

Genus of about 20 species of freshwater algae

Question 20

Daughter colonies.

Answer 20

Secondary colonies growing on the surface of older colonies

Question 21

Spirogyra

Answer 21

Genus of common fresh water alga with filamnetous body forms

Question 22

Ulva

Answer 22

“Sea lettuce,” genus name of a type of marine “leafy” green algae

Question 23

Alternation of generations

Answer 23

Adaptive feature of less evolved organisms allowing them to capitalize on the advantages of both sexual and asexual reproduction