Biological Classification Test

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Biological Classification Test - 94

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Question 1
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Which of the following is unicellular?

A
Euglena

B
Pinus

C
Moss

D
Rhizopus

Solution

Euglena is a genus of single-celled flagellate protists. Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enables them to feed by autotrophs, like plants. However, they can also take nourishment heterotrophically, like animals.
Pinus is a gymnosperm tree.
Mosses are small flowerless plants that usually grow in dense green clumps or mats, in damp or shady locations.
Rhizopus is a genus of common saprophytic fungi on plants and specialized parasites on animals.
Therefore, the correct answer is option A.
Question 2
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Why are protozoans regarded as primitive animals?

A
They are unicellular and microscopic.

B
Tissues, organs and organ systems are not developed in them.

C
Both A and B.

D
None of these.

Solution

Protozoans are called primitive animals because they are regarded as ancestors of all multicellular eukaryotic organisms. They belong to the kingdom Protista. Protozoans have an acellular organization. They do not possess tissues and organs. They are mostly unicellular.
Hence the correct option is C.
Question 3
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Protistan algae include the members like___________________-

A
Diatoms

B
Dinoflagellates

C
Euglenoids

D
All of the above

Solution

The taxonomic kingdom Protista is a collection of single-celled organisms that do not fit into any other category. Protists are a group made up of protozoa, unicellular algae, and slime molds.
In short, protist algae include diatoms, dinoflagellates, and euglenoids.
Question 4
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Which class of protozoa is totally parasitic?

A
Flagellata

B
Sporozoa

C
Rhizopda

D
Ciliate

Solution

Sporozoa:
The fifth phylum of the Protist kingdom, known as Apicomplexa, includes several species of obligate intracellular protozoan parasites classified as Sporozoa because they form reproductive cells known as spores. Many sporozoans are parasitic and pathogenic species, such as Plasmodium (P. falciparum, P. malariae, P. vivax), Toxoplasma gondii, Pneumocysts carinii, Coccidian, Babesia, Cryptosporidum (C. parvum, C. muris). The Sporozoa reproduction cycle has both asexual and sexual phases. The asexual phase is termed as schizogony (from the Greek, meaning generation through division), in which merozoites (daughter cells) are produced through multiple nuclear fissions.
Hence the correct option is B.
Question 5
1 / -0

It is difficult to make anti-viral drugs because

A
Viruses use the host cell as machinery to grow and divide.

B
Viruses are surrounded by protein coat.

C
Viruses are one of the borderline of living and non-living state.

D
Viruses are very small in size.

Solution

Viruses are non-living outside the host cells and become living inside the host as it uses the host's cells as machinery to replicate. This property of virus makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism's cells. Thus, the correct answer is option A.
Question 6
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Lichens are important in the studies on atmospheric pollution because they

A
Can cause eutrophication

B
Efficiently purify the atmosphere

C
Are very sensitive to pollutants like $$SO_2$$

D
None of the above
Solution
- A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.
- If air is very badly polluted with sulfur dioxide($$SO_2$$) there may be no lichens present, just green algae may be found. If the air is clean, shrubby, hairy and leafy lichens become abundant
- Hence Lichens are important in the studies on atmospheric pollution because they are very sensitive to pollutants like sulfur dioxide.
- So, the correct answer is ' Are very sensitive to pollutants like $$SO_2$$.
Question 7
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Bacterial ribosomes are found

A
In the cytoplasm.

B
On nuclear memberane.

C
On the cell wall.

D
On endoplasmic reticulum.

Solution

The ribosomes are the cellular organelles which are associated with the protein synthesis. The bacteria are the prokaryotic organisms which do not have cellular organelles. The ribosomes are not associated with endoplasmic reticulum in the bacteria and are dispersed in the cytoplasm. There are 70S ribosomes in the bacterial cytoplasm which translate the mRNA to protein. Thus, the correct answer is option A.
Question 8
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Cell of Amoeba is

A
Spindle shaped

B
Broad shaped

C
Spherical in shape

D
Indefinite in shape

Solution

Amoeba forms pseudopodia (temporary projections of cell) for movement and engulfment of food particles. Hence, they do not show any particular shape. Thus the correct option is D.
Question 9
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Highly resistant thick walled spores produced by bacterial cells during unfavourable conditions are called as

A
Endospores

B
Heterocyst

C
Gemmules

D
Zoospores

Solution

A_ Endospores are highly resistant to very high and very low temperature. Under unfavorable conditions cytoplasm shrinks and gets rounded and around it a hard protective three layer is formed known as endospore. When favorable conditions come outer layer rupture and active bacterial cell come out
Question 10
1 / -0

Methanogens can be found

A
In swamps

B
In a cow's stomach

C
In marshes

D
All of the above

E
None of the above

Solution

Methanogens are the primitive bacteria belonging to archaea which are able to produce methane. These organisms can utilise the carbon dioxide and hydrogen gas to form methane. These organisms are found in marshy areas where they produce the marsh gas, in swamps and in the stomach of certain animals. These organisms are responsible for methane production in the stomach of cattle which causes belching.
Thus, the correct answer is option D.

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Biological Classification Test - 94

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Biological Classification Test - 94

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SHARING IS CARING

Question 1

Euglena

Pinus

Moss

Rhizopus

Solution

Question 2

They are unicellular and microscopic.

Tissues, organs and organ systems are not developed in them.

Both A and B.

None of these.

Solution

Question 3

Diatoms

Dinoflagellates

Euglenoids

All of the above

Solution

Question 4

Flagellata

Sporozoa

Rhizopda

Ciliate

Solution

Question 5

Viruses use the host cell as machinery to grow and divide.

Viruses are surrounded by protein coat.

Viruses are one of the borderline of living and non-living state.

Viruses are very small in size.

Solution

Question 6

Can cause eutrophication

Efficiently purify the atmosphere

Are very sensitive to pollutants like $$SO_2$$

None of the above

Solution

Question 7

In the cytoplasm.

On nuclear memberane.

On the cell wall.

On endoplasmic reticulum.

Solution

Question 8

Spindle shaped

Broad shaped

Spherical in shape

Indefinite in shape

Solution

Question 9

Endospores

Heterocyst

Gemmules

Zoospores

Solution

Question 10

In swamps

In a cow's stomach

In marshes

All of the above

None of the above

Solution

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