Lab Taxonomy of Algae

Question 1

Carteria

Answer 1

cells cylindrical or circular in end view.

Question 2

Platymonas

Answer 2

cells ellipsoidal to rectangular in end view.

Question 3

Polytoma

Answer 3

cells lack chlorophyll.

Question 4

Stephanoptera

Answer 4

organisms lacking a definite cell wall or lorica, changing shape slightly with movement.

Question 5

Dysmorphococcus

Answer 5

Lorica with granules present; strands of cytoplasm c0nnceting protoplast to cell wall present.

Question 6

Haematococcus

Answer 6

cell wall granule absent; strands of cytoplasm connecting protoplast to cell wall present.

Question 7

Brachiomonas

Answer 7

posterior end of cell with conical projections.

Question 8

Chlamydomonas

Answer 8

posterior end of cell lacking conical projections.

Question 9

Gonium

Answer 9

colonies quadrangular in shape, not differentiated into anterior or posterior parts.

Question 10

Platydorina

Answer 10

colonies horseshoe-shaped with an anterior/posterior differentiation.

Question 11

Stephanospheara

Answer 11

Cells spindle-shaped and bearing spine-like protrusions.

Question 12

Pandorina

Answer 12

Cells crowded near the center of a gelatinous sphere and often touching one another.

Question 13

Eudorina

Answer 13

cells spaced around the periphery of a gelatinous sphere and usually not touching one another.

Question 14

Volvox

Answer 14

colonies with 500 or more cells.

Question 15

Hydrodictyon

Answer 15

cells form tubular, net-like colonies.

Question 16

Scenedesmus

Answer 16

long axes of cells parallel to each other; cells forming a more or less linear series.

Question 17

Pediastrum

Answer 17

long axes of cells not parallel to each other; cells form a more or less rectangular to circular structure.

Question 18

Ankistrodesmus

Answer 18

cells elongate, more or less spindle-shaped.

Question 19

Gloeocystis

Answer 19

cells spherical to ovoid.

Question 20

Hyalotheca

Answer 20

cells circular in end view.

Question 21

Desmidium

Answer 21

cells elliptical or angular in end view.

Question 22

Spirogyra

Answer 22

chloroplasts spirally twisted.

Question 23

Oedogonium

Answer 23

Chloroplasts form a net-like reticulum.

Question 24

Ulothrix

Answer 24

Chloroplast forming a solid, band-like plate.

Question 25

Zygnema

Answer 25

Chloroplasts star-shaped.

Question 26

Mougeotia

Answer 26

Chloroplasts band (ribbon)-shaped.

Question 27

Chara

Answer 27

Branches arising in whorls.

Question 28

Bulbochaete

Answer 28

organisms bearing colorless, spinelike cells with swollen bases.

Question 29

Stigeoclonium

Answer 29

Ends of branches tapering to sharp points.

Question 30

Cladophora

Answer 30

Ends of branches more or less broadly rounded.

Question 31

Staurastrum

Answer 31

cells tri to polyradiate in end view.

Question 32

Microsterias

Answer 32

sides of cells with obvious indentations in addition to median constrictions.

Question 33

Cosmarium

Answer 33

sides of cells lacking indentations other than median constrictions.

Question 34

Golenkinia

Answer 34

cells covered with long, thin spines.

Question 35

Eremosphaera

Answer 35

cells containing numerous chloroplasts.

Question 36

Trebouxia

Answer 36

Chloroplast stellate, axial.

Question 37

Chlorella

Answer 37

Chloroplast cup-shaped, or bandlike and parietal.

Question 38

Protosiphon

Answer 38

cells have a tubular to bladder-shaped portion with chlorophyll and colorless rhizoidal portion.

Question 39

Mesotaenium

Answer 39

cells ellipsoidal, with broad, rounded ends.

Question 40

Ankistrodesmus

Answer 40

cells needle-shaped with acutely pointed ends.

Question 41

Closterium

Answer 41

cells with 2 or 4 distinct chloroplasts.