Algae

Question 1

example of an animal that is in association with algae

Answer 1

sloth bear

Question 2

examples of colonial algae

Answer 2

volvox

Question 3

examples of filamentous algae

Answer 3

ulothrix
spirogyra

Question 4

a few marine algae such as _______, form massive plant bodies

Answer 4

kelps

Question 5

vegetative reproduction in algae is by

Answer 5

fragmentation

Question 6

asexual reproduction is by

Answer 6

spores (commonly zoospores)

Question 7

sexual reproduction is by

Answer 7

fusion of two gametes

Question 8

isogamous flagellated reproduction is seen in

Answer 8

ulothrix

Question 9

isogamous non-motile reproduction is seen in

Answer 9

spirogyra

Question 10

anisogamous reproduction is seen in

Answer 10

eudorina

Question 11

oogamous reproduction is seen in

Answer 11

volvox
fucus

Question 12

how many species of marine algae are used as food

Answer 12

70

Question 13

examples among those 70 are

Answer 13

porphyra
laminaria
sargassum

Question 14

agar is obtained from which algae

Answer 14

gelidium
gracilaria

Question 15

agar is used for

Answer 15

growing microbes
preparation of ice-creams and jellies

Question 16

which unicellular alga rich in proteins is used as a food supplement by space travellers

Answer 16

chlorella

Question 17

three classes of algae

Answer 17

chlorophyceae
phaeophyceae
rhodophyceae

Question 18

chlorophyceae are commonly called

Answer 18

green algae

Question 19

green algae are grass green in colour due to which pigments

Answer 19

chlorophyll a and b

Question 20

pyrenoids are located in

Answer 20

chloroplasts

Question 21

what do pyrenoids contain

Answer 21

protein
starch

Question 22

other reserve material for algae

Answer 22

oil droplets

Question 23

green algae usually have a rigid cell wall made of an inner layer of ___________ and outer layer of ___________

Answer 23

cellulose
pectose

Question 24

examples of chlorophyceae

Answer 24

chlamydomonas
volvox
ulothrix
spirogyra
chara

Question 25

phaeophyceae commonly called as

Answer 25

brown algae

Question 26

filamentous brown alga

Answer 26

ectocarpous

Question 27

kelps may reach a height of

Answer 27

100m

Question 28

pigments in brown algae

Answer 28

chlorophyll a, c, carotenoids, xanthophylls

Question 29

colour of brown algae depends on

Answer 29

xanthophyll pigment, fucoxanthin

Question 30

reserve food material for brown algae

Answer 30

complex carbohydrates - laminarian mannitol

Question 31

phaeophyceae members have a gelatinous coating of

Answer 31

algin

Question 32

plant body of brown algae is attached to substratum by __________, has a stalk called ______________, leaf like photosynthetic organ ___________

Answer 32

holdfast stipe frond

Question 33

zoospores of brown algae are usually _____________ shaped and how are the flagella

Answer 33

pear unequal laterally attached

Question 34

pear-shape is called

Answer 34

pyriform

Question 35

shape of gametes in brown algae and what about their flagella

Answer 35

pyriform two laterally attached

Question 36

examples of phaeophyceae

Answer 36

ectocarpus dictyota laminaria sargassum fucus

Question 37

rhodophyceae are commonly called

Answer 37

red algae

Question 38

why are red algae red

Answer 38

red pigment - r-phycoerythrin

Question 39

habitat of red algae

Answer 39

warm areas, marine

Question 40

reserve food in red algae is stored in form of

Answer 40

floridean starch

Question 41

floridean starch is very similar in structure to

Answer 41

amylopectin glycogen

Question 42

examples of red algae

Answer 42

polysiphonia porphyra gracilaria gelidium