green algae

Question 1

green algae

Answer 1

relative absence of accessory pigments for chlorophyll colours are unmasked

Question 2

Unicellular

Answer 2

(motile and nonmotile)

Question 3

Colonial

Answer 3

Colonial (motile or nonmotile) – loose aggregations of cells held together by mucilage or intercellular connections
Coenobium – cell number fixed at time of development (e.g., Volvox, Hydrodictyon, Scenedesmus)

Question 4

Filamentous

Answer 4

Uniseriate to multiseriate
Branched or unbranched
Heterotrichous – differentiated into erect and prostrate parts

Question 5

Siphonous / coenocytic

Answer 5

multinucleate, acellular

Question 6

some species cell wall

Answer 6

• calcium carbonate

- glycoproetin

Question 7

Some motile forms lose flagella during certain phases of lifecycle, becoming

Answer 7

palmelloid

Question 8

palmelloid

Answer 8

Applied to an algal colony composed of an indefinite number of non-motile cells embedded in a gelatinous or mucilaginous matrix. It may occur as a non-motile phase in a normally motile species

Question 9

some motile by

Answer 9

mucilage extrusion

Question 10

eyespot

Answer 10

when present, located in chloroplast, usually in anterior portion of cell near base of flagellum
Consists of one to several lipid droplets, usually located between outermost band of thylakoids and chloroplast envelope
Usually orange-red colour from carotenoids in lipid droplets

Question 11

some species contain photoreceptor

Answer 11

consisting of chrmophore

-measures light at different time intervals as cell change its position relative to light

Question 12

axial

Answer 12

central

Question 13

parietal

Answer 13

edges

Question 14

thylakoids

Answer 14

stacked in groups of two to six (lamellae) with pseudograna

Question 15

pseudograna

Answer 15

areas of stacked in columns by partial overlap of thylakoids

Question 16

pyrenoids

Answer 16

embedded in chloroplast and often penetrated by thylakoids, associated with true starch deposition

Question 17

starch is stored in

Answer 17

chloroplast

Question 18

photoheterotrophic

Answer 18

(use organic carbon only when light available and when limited by dissolved inorganic carbon supply

Question 19

Phycoplast

Answer 19

algae made- Found in simpler forms (Chlorophycean line)
Two daughter nuclei close together
After mitotic division, spindle fibers disappear and are replaced by more microtubules perpendicular to plane of division
New cell wall forms across microtubules by furrowing (ingrowth of cell membrane) or cell-plate formation (outward growth from centre)

Question 20

Phragmoplast

Answer 20

wall made - Found in higher green algae and more advanced plants (Charophycean line)
After mitotic division, two daughter nuclei held far apart by persistent spindle fibers perpendicular to plane of division
Golgi vesicles aggregate on spindle fibers and form new cell plate via furrowing or cell plate