Algae

Question 1

In fragmentation each fragment develops into

Answer 1

A thallus

Question 2

In algae vegetative reproduction is by

Answer 2

Fragmentation

Question 3

In algae asexual reproduction is by

Answer 3

Different types of spores
Most common zoospores

Question 4

Zoospores are

Answer 4

Flagellated motile
On germination give rise to new plants

Question 5

In algae sexual reproduction is by

Answer 5

Fusion of gamets

Question 6

Isogamous flagellated

Answer 6

Ulothrix , clymydomonas, chara

Question 7

Isogamous non flagellated

Answer 7

Spirogyra

Question 8

Anisogamous

Answer 8

Clamydomonos , eudorina

Question 9

Oogamous

Answer 9

Volvox
Fucus

Question 10

Oogamous

Answer 10

Male gamete small motile
Female gamete large non motile

Question 11

Unicellular algae

Answer 11

Chlorella

Clamydomonos (not algae it’s protist but still)

Question 12

Filamentous algae

Answer 12

Ulothrix
spirogyra

Question 13

Algae are

Answer 13

Non tracheophytes vascular tissue absent
Non embryophytes

Question 14

Sex organs in algae

Answer 14

Are not jacketed or covered

Question 15

Algae are classified on the basis of

Answer 15

Photosynthetic pigment

Storage form of food

Cell wall structure

Zoospores and flagellation

Question 16

Habitat of chlorophyceae

Answer 16

Mainly fresh water

Some marine

Fresh water , brackish water , salt water

Question 17

Green algae pigment

Answer 17

Chlorophyll a and b
Carotenoids and xanthophylls

Question 18

Star shaped

Answer 18

Zygonema

Question 19

Reticulate

Answer 19

Eudogonium

Question 20

Cup shaped

Answer 20

Chlamydomonos

Question 21

Storage food of chlorophyceae

Answer 21

Mainly starch
Some store in form of oil droplets

Question 22

Storage bodies found in chloroplast

Answer 22

Pyrenoids

Question 23

Pyrenoids

Answer 23

Starch beside protein

Protein centre
Starch sheath

Question 24

Starch and glycogen are

Answer 24

Storage polysaccharides
Have structural similarities

Question 25

Cell wall of chlorophyceae

Answer 25

Inner layer cellulose
Outer layer pectose

Question 26

Zoospores in green algae have flagella

Answer 26

2-8
Equal apical

Question 27

Pheophyceae habitat

Answer 27

Exclusively marine
Freshwater rare

Fresh water (rare)
Brackish water
Salt water

Question 28

Pheophyceae pigment

Answer 28

Chlorophyll a and c
Carotenoids

Xanthophylls - fucoxanthin on which the colour of brown algae depends

Question 29

Colour of brown algae vary from

Answer 29

Olive green to brown

Question 30

Kelps may reach upto

Answer 30

100 meters

Question 31

Storage food of brown algae

Answer 31

Laminating and mannitol
(Complex carbohydrates)

Question 32

Cellulose covered by gelatinous layer of algin

Answer 32

Brown algae

Question 33

Cell wall of pheophyceae

Answer 33

Inner layer cellulose

Outer layer hydrocolloids / phycocolloids water holding capacity
Algin ( used in gel electrophoresis)

Question 34

Zoospores in brown algae

Answer 34

2 in number
Biflagellated unequal
Laterally inserted
Pear shaped (poryform)

Question 35

Haplodiplontic life cycle

Answer 35

Euctocarpus

Question 36

Diplontic life cycle

Answer 36

Fucus

Question 37

Red algae habitat

Answer 37

Fresh water (some)
Brackish water
Salt water (most)

Mostly marine with greater concentration in warmer areas

They occur in both well lighted regions close to surface of water and also at great depths of ocean where relatively less light penetrates

Question 38

Floridean starch is very similar to

Answer 38

Amylopectin and glycogen in structure

Question 39

Red algae

Answer 39

Mostly multicellular
Some have complex body structure

Question 40

Reproduction in red algae

Answer 40

Vegetative by fragmentation

Asexualy by non motile spores

Sexually by non motile gametes. Oogamous

Question 41

Which algae have complex post fertilisation development

Answer 41

Red algae