Ch. 18 Part 1

Question 1

Name the key features of Protista

Answer 1

domain eukarya, unicellular and multicellular, very diverse

nutrition involves photosynthesis, ingestion and reabsorption

reproduction genreally all cell division and sexual processes

Question 2

ALgae

Answer 2

seaweed, pond scums, fish tank films

in several phyla based on reporductive cell forms

Question 3

Phylum Chlorophyta

Answer 3

green algae

unicellular, filamentous, netlike tubes, hollow spheres, lettuce-like leaves

found in freshwater lakes, ponds, streams

store food as starch

contain chlorophyll a and b

single nucleus per cell

asexual and sexual reproduction

Question 4

example of Chlorophyta

Answer 4

Chlamydomonas, Ulothrix, Spirogyra, Oedogonium

Question 5

Chlamydomonas

Answer 5

in freshwater pools, pair of whiplike flagella, single cup shaped chloroplast, 2 or more vacuoles

Question 6

Ulothrix

Answer 6

found in dead twigs, rocks

each have single row of cylindrical cells called filament, have holdfast to attach to things

Question 7

Spirogya

Answer 7

filaments of cylindrical cells, masses in freshwater, wrapped around vacuole, asexual (fragmentation by filament) and sexual (conjugation) reproduction

Question 8

Acetabularia

Answer 8

single huge cell in mushroom shape

Question 9

Volvox

Answer 9

colony held in gelatinous material, hollow ball

Question 10

Phylum Chromophyta

Answer 10

yellow green algae, golden-brown, diatoms, brown algae

2 flagella opposite sides

freshwater and few marine

includes ficoxthamin

Question 11

Golden brown algae

Answer 11

in plankton of freshwater, carotenoid pigment, motile, photoreceptor on shrot flagellum

Question 12

Diatoms

Answer 12

fresh and saltwater, unicellualr, look like glass box (95% silica wall), have chlorophyll a, c, c2, and fucoxthamin

Question 13

Diatom reproduction

Answer 13

asexual: half cells become smaller

sexual: zygotes called auxospores divide at same time, number made equal to proportion of silica available, size restored from asexual reproduction

Question 14

Brown algae

Answer 14

brown/olive green, large(none uni or colonial), most marine in shallow water, most have thallus that differentiates into holdfast (stipe, blades)

may have gas filled bladder

chlorophyll a, c, fucoxthamin

algin in cell walls

Question 15

Phylum Rhodophyta

Answer 15

red algae, filamentous, tightly packed in macro structures, deeper than brown algae

has chlorophyll a, sometimes d

Question 16

Life cycle in Phylum Rhodophyta

Answer 16

three types of thallus structures

male and female gametophyte

unique sporophyte

Question 17

Phylum Euglenophyta

Answer 17

no cell wall (pellice = plasma)

red eye spot, flagellum, gullet ingests food, includes euglenoids