1.) Which of the following is an example of algae occurring in association with fungi?
a) Mycorrhiza
b) Corals
c) Lichens
d) Blue green algae
2.) In the species of Eudorina, when two dissimilar gametes fuse then they are termed as:
a) Zoospores
b) Oogamous
c) Anisogamous
d) Isogamous
3.) Which of the following is NOT an example of filamentous form of algae?
a) Spirogyra
b) Volvox
c) Ulothrix
d) Pithophora
4.) Which is the correct definition of Oogamous?
a) When the fusion takes place between a larger non-motile female and a smaller non-motile male then it is known as Oogamous.
b) When gametes are similar in size and fuse together then it is known as Oogamous.
c) When gametes have dissimilar size and fuse together then it is known as Oogamous.
d) When the gametes have similar size but one is flagellated and other is non-flagellated then it is known as Oogamous.
5.) Which of the following is the correct statement with respect to the reproduction in algae?
a) Algae reproduce only by vegetative method.
b) Algae mostly reproduce by sexual method.
c) Spores are the main reproductive forms.
d) Algae reproduce by the vegetative, asexual, and sexual methods.
6.) Agar is a commercial product and it is mainly used:
a) In the preparation of Jellies
b) In the Preparation of ice-creams
c) To grow microbes
d) All of them.
7.) Choose the correct pair.
i) Isogamous- Spirogyra
ii) Anisogamous- Ulothrix
iii) Oogamous- Fucus
a) Only (i) and (iii) are correct
b) Only (i) is correct
c) (i), (ii), (iii) are correct
d) Only (ii) is correct
8.) Which is the outer layer in Green algae?
a) Cellulose
b) Chitin
c) Scale
d) Pectose
9.) Which among the following is an example of unicellular algae rich in proteins and is used as food supplements by space travellers?
a) Chlorella
b) Volvox
c) Porphyra
d) Dictyota
10.) Rhodophyceae contain which of the following as a major pigment?
a)Chlorophyll c
b) Chlorophyll b
c) Fucoxanthin
d) Phycoerythrin
11.) Which among the following classes of algae contain storage bodies called pyrenoids in the chloroplast?
a) Rhodophyceae
b) Phaeophyceae
c) Chlorophyceae
d) Phanerophyceae
12.) The study of algae is known as ………………………………………………………………………………………….
a)Algology
b) Mycology
c) Phycology
d) Both a) and c)
13.) Which among the following statements is NOT correct with respect to Phaeophyceae?
a) They have storage bodies called pyrenoids
b) They are also called brown algae
c) They possess chlorophyll a,c, carotenoids and xanthophylls
d) The plant body is characterised by holdfast, stalk, stipe and frond
14.) Cryophytic type of algae lives in …………………………………………………………………………………………….
a) Snow
b) Water
c) Fresh water
d) Parasite
15.) Which of the following is the example of Chlorophyceae?
a) Fucus
b) Chlamydomonas
c) Polysiphonia
d) Porphyra
16.) Halophytic algaeis referred to algae that lives:
a)On other aquatic Plants
b) On aquatic animals
c) In Salt water
d) Float on the water surface
17.) Match list-I with list-II
List-I |
List-II |
||
(a) | Rhodophyceae | (i) | Chlorophyll a,b |
(b) | Chlorophyceae | (ii) | Food supplement in space |
(c) | Phaeophyceae | (iii) | Brown algae |
(d) | Chlorella | (iv) | Food stored as floridean starch |
(a) (b) (c) (d)
a) (i) (ii) (iii) (iv)
b) (iv) (ii) (i) (iii)
c) (i) (iii) (ii) (iv)
d) (iv) (i) (iii) (ii)
18.) Algae that live in leave, bark, and rocky substratum are:
a) Aquatic algae
b) Endozoic algae
c) Edaphic algae
d) Aerial algae
19.) Which of the following pigment is predominantly present in the body of Rhodophyceae?
a) Chlorophyll
b) r-phycoerythrin
c) Haemoglobin
d) Carotenes
20.) Which of the following found in some body of insect larvae.
a) Characium
b) Zooxanthellae
c) Zoochlorella
d) None of these
21.) Living organisms like Polysiphonia, Porphyra, Gracilaria, Gelidium, etc are the examples of which of the following classes of algae?
a) Rhodophyceae
b)Chlorophyceae
c) Phaeophyceae
d) Phenerophyceae
22.) Chloraster consists of:
a) Three flagella
b) Five flagella
c) Six flagella
d) Four flagella
23.) Match List-I with List II:
List-I | List-II | ||
(a) | Green algae | (i) | Laminaria |
(b) | Red algae | (ii) | Volvox |
(c) | Brown algae | (iii) | Porphyra |
(a) (b) (c)
a) (ii) (iii) (i)
b) (i) (ii) (iii)
c) (i) (iii) (ii)
d) (iii) (i) (ii)
24.) Which of the following is an example of Edaptive algae?
a) Chlamydomonas
b) Chara
c) Anabaena
d) Nitella
25.) Which of the following statements is INCORRECT with respect to “algae”?
a) Asexual reproduction is by production of sores
b) Can be found in association with fungi and animals
c) They are considered to be secondary consumers in the aquatic ecosystem
d) They increase the level of oxygen in the environment
26.) A flexible cell membrane in motile algae is known as:
a) Periplasts
b) Neuroplast
c) Chloroplast
d) Leukoplast
27.) Which of the following product is obtained from Gracilaria and is used in preparations of ice cream and jellies?
a) Agar
b) Carrageen
c) Nori
d)Wakame
28.) A pigment spot that is present in motile flagella is known as:
a) Stigma
b) Pellicle
c) Eye-spot
d) Both a) and c)
29.) Which of the following statements are correct with respect to Rhodophyceae?
(i) Food is stored as Floridean starch
(ii) Asexual reproduction is usually by fragmentation
(iii) They are red in colour because of the predominance of the pigment r- phycoerythrin.
a) (i) and (ii)
b) Only (i)
c) Only (ii)
d) (i) and (iii)
30.) Which of the following is present in the chromatophores?
a) Chlorophyll a
b) Chlorophyll b
c) Chlorophyll c
d) Chlorophyll a and b
Answers:
1.)
Solution:(c) Lichens
Algae are known to have a symbiotic relationship with fungi and this association of algae with fungi is known as lichens.
2.)
Solution: c) Anisogamous
Eudorina species contain two gametes with different or dissimilar size. Hence, when two dissimilar in size gametes fuse then they are termed as Anisogamous.
3.)
Solution: (b) Volvox
Volvox is not a filamentous type of algae rather it’s a colonial type of algae. Filamentous type of algae has filamentous structure that intertwine together to form a mesh like appearance.
4.)
Solution: a) When the fusion takes place between a larger non-motile female and a smaller non-motile male then it is known as Oogamous.
In the Oogamous, one female is large and one male is small but both are non-motile. Hence, when the fusion takes place between a larger non-motile female and a smaller non-motile male then it is known as Oogamous.
5.)
Solution:(d) Algae reproduce by the vegetative, asexual and sexual methods.
Reproduction in algae is occurs by vegetative method which involves fragmentation. Asexual reproduction occur by the production of spores and sexual reproduction takes place by the fusion of two gametes.
6.)
Solution: d) All of them.
Agar is mainly obtained from Gelidium and Gracilariaand is a commercial product. It is used in the preparation of ice-creams and jellies, and to grow microbes.
7.)
Solution:(a) Only (i) and (iii) are correct
Both Spirogyra and Ulothrix are the examples of Isogamous reproduction because they have similar sized gametes. Eudorina having dissimilar gametes is the example of Anisogamous reproduction.
8.)
Solution: d) Pectose
Cell wall of the green algae is rigid and made up of an inner layer and an outer layer. Inner layer is of cellulose and outer layer is of Pectose.
9.)
Solution:(a) Chlorella
Chlorella is a protein rich unicellular alga which is commonly used by the space travellers as a food supplement. It is also rich in several vitamins, minerals and antioxidants.
10.)
Solution: d) Phycoerythrin
Chlorophyll a and chlorophyll b are the major pigments of Chlorophyceae, Chlorophyll c and fucoxanthin are the major pigments of Phaeophyceae. Chlorophyll a, chlorophyll d and phycoerythrin are the major pigments of Rhodophyceae.
11.)
Solution:(c) Chlorophyceae
Chlorophyceae contain pyrenoids in their chloroplasts. Pyrenoids contain proteins and acts as storage bodies.
12.)
Solution: d) Both a) and c)
A term where study of algae happen is known as phycology or algology where phyco means sea weeds.
13.)
Solution: (a) They have storage bodies called pyrenoids.
In Phaeophyceae, food is stored as complex carbohydrates, usually in the form of laminarin or mannitol. But pyrenoids are not present in paeophyceae.
14.)
Solution: a) Snow
Algae which lives in ice or snow are referred to as Cryophytic algae. For example, Cylindrocystis and Trochiscia both live in ice and snow.
15.)
Solution:(b) Chlamydomonas
Chlamydomonas is the only example of Chlorophyceae among the options. Polysiphonia and Porphyra are the examples of Rhodophyceae and Fucus is the example of Phaeophyceae.
16.)
Solution:c) In Salt water
Halophytic algae are also known as Halophytes because they live in seas, oceans. Hence, Halophytic algae is referred to algae that lives in water.
17.)
Solution:(d) (iv) (i) (iii) (ii)
In Rhodophyceae food is stored as floridean starch. Chlorophyceae contains chlorophyll a,b. Paeophyceae is also known as brown algae and chlorella is the food supplement used by space travellers.
18.)
Solution:d) Aerial algae
Algae which lives in plants, walls, animals, and terrestrial, rocks and Fencing wires are called as Aerial algae. Epiphytes mainly live in leaves, Epiphloeophytes live in bark and Lithophytes live in rocky substratum. Hence Algae that live in leave, bark, and rocky substratum are Aerial Algae.
19.)
Solution:(b) r-phycoerythrin
Members of the Rhodophyceae predominantly contain the pigment r-phycoerythrin which gives the characteristic red colour to the algae.
20.)
Solution:a) Characium
All the given options comes under Endozoic algae. Zooxanthellae is mainly seen in fresh water sponges. Zoochlorella found inside the body of hydra. Characium is found in some body of insect larvae. Hence, Characium is the correct answer.
21.)
Solution:(a) Rhodophyceae
Polysiphonia, Phorphyra, Gracilaria, Gelidium are the most common members of the class Rhodophyceae.
22.)
Solution:b) Five flagella
Tricloris contain three flagella, Carteria contains four flagella, Chloraster contains five flagella and Pocillomonas contain six flagella. Hence, five flagella is the right answer.
23.)
Solution:(a) (ii) (iii) (i)
Volvox is a common example of green algae, Porphyra is an example of red algae and Laminaria is an example of brown algae.
24.)
Solution:c) Anabaena
Chlamydomonas is an example of Halophytic algae, Nitella and Chara are the examples of Epiphytic algae. Anabaena is an example of Edaphic algae. Hence, Anabaena is the correct answer.
25.)
Solution:(c) They are considered to be secondary consumers in the aquatic ecosystem.
Algae are the important primary producers of energy rich compounds in the aquatic ecosystem.
26.)
Solution:a) Periplasts
For example, Euglena is a motile algae. Euglena contains Periplasts as a flexible cell membrane. Hence, a flexible cell membrane of motile algae is Periplasts.
27.)
Solution:(a) Agar
Agar is a gelatin like substance which is primarily produced from the cell walls of some species of red algae like Gracilaria and Gelidium.
28.)
Solution:d) Both a) and c)
When some algae does not contain true cell wall but has a membrane then it is known as pellicle. A pigment spot that is present in motile flagella is known as eye-spot or Stigma.
29.)
Solution:(d) (i) and (iii)
Rhodophyceae usually reproduce asexually by the means of non-motile spores.
30.)
Solution: a) Chlorophyll a
Chlorophyll a and b are present in the chromoplasts. Only chlorophyll a is present is the chromatophores.