Biological Classification Test 11

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Biological Classification Test 11

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Question 1
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Mycoplasma are often called as PPLO (pleuropneumonia like organisms).
Reason : They are the simplest unicellular prokaryotes.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Mycoplasma are the simplest unicellular prokaryotes. They are often called as PPLO (pleuropneumonia like organisms) because they were first isolated from pleural fluids of cattle suffering from pleuropneumonia.
Question 2
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Viruses are considered organism.
Reason : Viruses are nucleoproteins that lack cell organelles.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Viruses are not considered organism as they have no independent machinery.
Question 3
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Some fungi are called as ‘imperfect fungi’.
Reason : Sexual reproduction is absent in some forms of fungi.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

The class deuteromycetes in fungi are known as “imperfect fungi” due to absence of sexual reproduction.
Question 4
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Euglenoids are heterotrophic and autotrophic organisms.
Reason : Euglenoids have chlorophyll and can prepare their food in the presence or absence of sunlight.

A
Assertion (A) is false but reason (R) is true.

B
Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
Assertion (A) is true but reason (R) is false.

D
Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

Solution

Euglenoids are both autotrophic and heterotrophic. They have chlorophyll and hence in the presence of sunlight they can prepare their food by the process of photosynthesis. In absence of sunlight, they behave like a predator and feed on other smaller microorganisms.
Question 5
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Assertion : Fungi are called cosmopolitan.
Reason : All fungi are non-edible.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Fungi are found in most parts of the world and under varied ecological conditions. They are present in air, water, soil and on animals and plants around the world. That is why they are called cosmopolitan. Fungi are of two types – edible or non-edible ones. Few fungi like Mushroom are used as nutritious food. Some fungi produce toxins such as phallotoxins and amatoxins so, they cannot be consumed for example, Toadstools or poisonous fungus are those which produce toxins.
Question 6
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Unicellular algae been not kept in kingdom Protista by Whittaker.
Reason : A distinction between unicellular and multicellular organisms is not possible in case of algae.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

A distinction between unicellular and multicellular organisms is not possible in case of algae. It is because of this unicellular green algae have not been included in kingdom Protista by Whittaker. Unicellular algae forms are placed in kingdom Protista but unicellular green algae are placed in Kingdom Plantae and not included in Protista due to their resemblance with other green algae.
Question 7
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Trichoderma, Colletotrichum are called ‘Imperfect fungi’.
Reason : Sexual reproduction is absent in these forms.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Trichoderma, Colletotrichum are called as imperfect because sexual reproduction is absent in these forms.
Question 8
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Lichens are said to be dual organisms.
Reason : They show a symbiotic association between a fungus and an alga.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Lichens are said to be dual organisms because they show a symbiotic association between a fungus and a alga.
Question 9
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Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Some bacteria can survive in extreme environmental conditions.
Reason : Archaebacteria are primitive prokaryotes.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Some bacteria can survive in extreme environmental conditions like high temperature, high salt concentration, in absence of oxygen or in presence of oxygen in high acidic or alkaline pH. Such bacteria are called archaebacteria. Their cell wall consists of non-cellulosic poly-saccharide or protein and lacks peptidoglycan. This allows them to survive in extreme conditions .
Question 10
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Protozoans have physiological division of labour.
Reason : They have a well-developed cell , tissue and tissue organ system.

A
Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
Assertion (A) is false but reason (R) is true.

D
Assertion (A) is true but reason (R) is false.

Solution

Protozoa are microscopic unicellular eukaryotes hence they neither have a well-developed cell, tissue and tissue organ system nor physiological division of labour.

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Biological Classification Test 11

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Biological Classification Test 11

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Question 1

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 2

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 3

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 4

Assertion (A) is false but reason (R) is true.

Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

Assertion (A) is true but reason (R) is false.

Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

Solution

Question 5

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 6

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 7

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 8

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 9

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 10

Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

Assertion (A) is false but reason (R) is true.

Assertion (A) is true but reason (R) is false.

Solution

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