Biological Classification Test

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Biological Classification Test - 93

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Weekly Quiz Competition

Question 1
1 / -0

CJD caused by

A
Viroid

B
Mycoplasma

C
Virus

D
Prion

Solution

Bovine spongiform encephalopathy is known as mad cow disease. The variant of this disease in humans is known as Creutzfeldt-Jakob disease (CJD). This disease results in the degeneration of the central nervous system. The disease is caused by a prion. The prions are infectious particles made up of protein. The infection is similar to the viral infection.
Thus, the correct answer is option D.
Question 2
1 / -0

Select the true statements out of the following.

A
The lichens are curious because they are composite or dual organism.

B
The apothecium consists of the fungal component only (e.g. Cladonia), such apothecia are called lecideine type.

C
Parmelia, Physica, Lecanora etc. have more highly developed apothecia called Lecanorine type in which both fungal and algal components are present.

D
All of the above.

Solution

Lichens are a small group of curious plants, they are curious because they are the composite or dual organism. They are the association between fungi and green algae or blue-green bacteria.
Apothecium is round and cup-shaped structure. If the apothecium consists only the fungal component, it is known as lecideine type (e.g., Lecidea, Cladonia, Gyrophora) and if it consists bath algal and fungal components it is known as lecanorine type (e.g., Lecanora, Parmelia).
Therefore, the correct answer is option D.
Question 3
1 / -0

Lichens multiply by

A
Soredia formation

B
Bud formation

C
Conidia formation

D
Oidia formation

Solution

Lichens reproduce vegetatively by soredia formation. It is the most common form of reproduction where small protuberances are formed on the thallus. They may have a definite pustule or appear as greyish dust. Many lichens reproduce asexually, either by vegetative reproduction or through dispersal of diaspores, which contain a few algal cells surrounded by fungal cells. Thus, the correct answer is option A.
Question 4
1 / -0

Lichen do not grow in cities because of the

A
Absence of the right type of algae and fungi

B
Lack of moisture

C
SO$$_2$$ pollution

D
Absence of natural habitats

Solution

Lichen is the composite organisms arising from algae or cyanobacteria. They are sensitive to $$SO_2$$ due to their efficient absorption system, which results in a fast accumulation of Sulphur. It results in the destruction of chlorophyll and inhibition of photosynthesis.

The correct answer is C.
Question 5
1 / -0

A semi-parasite relationship between the algal and fungal components of a lichen is termed as

A
Helotism

B
Predation

C
Parasitism

D
None of the above

Solution

According to Crombic, the relation between an algae and a fungi is helotism. Which is a kind of master-slave relationship, where the algal partner acts as a slave to the fungal partner, because, algae is an autotroph however, the fungal partner may hinder the reproduction and nutrition of the algae.
So, the correct answer is 'Helotism'
Question 6
1 / -0

Read the following statements about four kinds of microorganisms P, Q, R, and S.
(i) P converts milk into curd.
(ii) Q is used for making antibiotics.
(iii) R contains RNA as genetic material and causes the reduction in immunity of its host.
(iv) S is used to manufacture wine and beer.
Select the correct option.

A
P is yeast and R is HIV

B
Q is Lactobacillus and R is yeast

C
P is Lactobacillus and Q is Penicillium

D
Q is HIV and S is yeast

Solution

The label P refers to the organism which is the bacterium Lactobacillus. It is a rod-shaped, Gram-positive bacteria. They convert the lactose sugar present in the milk into the lactic acid through anaerobic fermentation which leads to the formation of curd.
The label Q refers to the organism Penicillium. It is an ascomycetous fungus. They produce antibiotic penicillin which is used to treat bacterial infections.
The label R refers to the HIV virus. The human immunodeficiency virus (HIV) is a retrovirus responsible for acquired immunodeficiency syndrome (AIDS), a condition in humans in which progressive failure of the immune system.
The label S refers to the organism yeast. Yeast performs anaerobic fermentation in which the sugar is converted to alcohol. They are used for the production of wine and beer.
Thus, the correct answer is option C.
Question 7
1 / -0

The structure(s) found in chlamydomonas but not in amoeba is/are:

A
cell wall

B
pyrenoid

C
plastids

D
all the above
Question 8
1 / -0

Why are protozoans placed in kingdom protista and not in kingdom animalia?

A
Protozoans have autotrophic mode of nutrition.

B
Protozoans are unicellular and have heterotrophic mode of nutrition.

C
Both A and B.

D
None of the above.

Solution

Protozoans are unicellular eukaryotic and mostly heterotrophic organisms. Due to their mobile nature and heterotrophic mode of nutrition they are considered relatives of animals. They are classified under Kingdom Protista as this kingdom includes all unicellular eukaryotic organisms having an autotrophic and heterotrophic mode of nutrition whereas kingdom Animalia includes all multicellular eukaryotic and heterotrophic organisms.
So, the correct answer is option B.
Question 9
1 / -0

Give two examples of unicellular organisms.

A
Hydra, Chara

B
Amoeba, Paramecium

C
Marchantia, Riccia

D
None of these

Solution

Hydra is a eukaryotic, multicellular organism belonging to the phylum Coelenterata.
Chara is a multicellular plant belonging to the group algae.
Marchantia and Riccia both are simple, primitive, multicellular, bryophytic plants with a well-differentiated plant body.
Amoeba and Paramecium both are protozoans belonging to Kingdom Protista. They are unicellular organisms. Thus, the correct answer is option B.
Question 10
1 / -0

Puccinia infection from Barberry to wheat occurs through

A
Teleutospores

B
Uredospores

C
Aeciospores

D
Pycnospores

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Biological Classification Test - 93

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Biological Classification Test - 93

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SHARING IS CARING

Question 1

Viroid

Mycoplasma

Virus

Prion

Solution

Question 2

The lichens are curious because they are composite or dual organism.

The apothecium consists of the fungal component only (e.g. Cladonia), such apothecia are called lecideine type.

Parmelia, Physica, Lecanora etc. have more highly developed apothecia called Lecanorine type in which both fungal and algal components are present.

All of the above.

Solution

Question 3

Soredia formation

Bud formation

Conidia formation

Oidia formation

Solution

Question 4

Absence of the right type of algae and fungi

Lack of moisture

SO$$_2$$ pollution

Absence of natural habitats

Solution

Question 5

Helotism

Predation

Parasitism

None of the above

Solution

Question 6

P is yeast and R is HIV

Q is Lactobacillus and R is yeast

P is Lactobacillus and Q is Penicillium

Q is HIV and S is yeast

Solution

Question 7

cell wall

pyrenoid

plastids

all the above

Question 8

Protozoans have autotrophic mode of nutrition.

Protozoans are unicellular and have heterotrophic mode of nutrition.

Both A and B.

None of the above.

Solution

Question 9

Hydra, Chara

Amoeba, Paramecium

Marchantia, Riccia

None of these

Solution

Question 10

Teleutospores

Uredospores

Aeciospores

Pycnospores

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