Biological Classification Test

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Biological Classification Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is the correct sequence of three steps in the sexual cycle of fungi?

A
Karyogamy, plasmogamy and meiosis

B
Meiosis, plasmogamy and karyogamy

C
Plasmogamy, karyogamy and meiosis

D
Meiosis, karyogamy and plasmogamy

Solution

The sexual cycle of fungi involves the following three steps:
1. The protoplasm of two motile or non-motile gametes fuses by the process of plasmogamy. It is fusion of two haploid cells without nuclear fusion.
2. Karyogamy involves fusion of nuclei of the two gametes.
3. Meiosis in zygote results in haploid spores.
Question 2
1 / -0

Which of the following system of classification is based on gross morphology of plants?

A
Natural system

B
Artificial system

C
Practical system

D
All system
Solution
- Natural System - These systems the plants were classified on the basis of their natural affinities (i.e. the basic similarities in the morphology) rather than on a character for determining the affinities.
- Compared to the artificial systems, it was based on the proper utilization of all facts and figures available in nature.
- In this system, the plants were grouped and placed into different taxa like classes, orders, families, and genera. Michel Adanson was the first scientist to reject all the artificial systems and support the natural systems of classification.
- The main demerit of this system was that the classification was not based on evolutionary relationships.
- Different families had been placed in specific groups which do not show any evolutionary relationships.
So, the correct answer is option A.
Question 3
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Lichens are not found in _________?

A
Water

B
Tree trunks

C
Decaying logs

D
Soil

Solution

Lichens are found in odd places which includes areas in the Arctic and Antarctic, and mountain tops. Lichens are found on soil, rock or tree bark. Some will also grow on old wood (dead branches, fence rails, etc.), masonry and cemetery headstones. Lichens are often found in extreme environments where other organisms are sparse.

So the correct option is 'Water'.
Question 4
1 / -0

Consider the features given below:

(i) Lack of cell wall
(ii) Lack of ATP generating system
(iii) Are facultative anaerobes
(iv) Are resistive to Penicillin
(v) Contain muramic acid in cell wall

Choose the correct option w.r.t the smallest free-living monerans.

A
All correct

B
(ii) and (iii) are correct

C
(ii), (iv) and (v) are incorrect

D
(i), (iii) and (iv) are correct

Solution

The smallest free-living monerans are the Mycoplasma. The Mycoplasma are organisms that completely lack a cell wall. They are the smallest living cells known and can survive without oxygen. They are naturally resistant to many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.
So, the correct option is '(i) (ii) and (iv) are correct'
Question 5
1 / -0

Consider the following statements and state true(T) or false(F).
(A) In Phycomycetes members, coenocytic mycelium is found.
(B) The common asexual spores in Basidiomycetes are conidia and zoospores.
(C) Mycelium of Ascomycetes is branched and septate.

A
(A)-T, (B)-T, (C)-T

B
(A)-T, (B)-F, (C)-T

C
(A)-T, (B)-T, (C)-F

D
(A)-F, (B)-T, (C)-F

Solution

(A) In Pycomycetes, the mycelium does not show the inner septation. There are no cross walls and nuclei are present in the common cytoplasm. Such a mycelium is called the coenocyte. They form asexual spores called zoospores.

(B) Basidiomycetes do not usually show the asexual reproduction. They reproduce sexually through the spores called basidia.

(C) Mycelium of Ascomycetes is branched and septate. They form asexual spores called conidia. Hence, the correct answer is (A)-T, (B)-F, (C)-T
Question 6
1 / -0

Which one is not related with virus ?

A
Non-cellular organism

B
Can be crystalized

C
Virus contain both DNA and RNA

D
Mosaic formation, yellowing and vein clearing are common symptoms due to viral infection.

Solution

A. Viruses are non cellular organisms as they don't have any cellular structure and their genetic material is enclosed within a protein capsule.
B. Viruses can be crystallized by which their viral components are organized into solid particles.
C. Viruses contain either DNA or RNA as their genetic material but not both.
D. Viruses attack plants and show some common symptoms of their infection like mosaic formation (a characteristic pattern formation), yellowing of leaves, clearing of veins etc.
Hence, statement C is incorrect.
So, the correct answer is 'Virus contain both DNA and RNA'.
Question 7
1 / -0

An animals phylum is defined on the basis of

A
Number of germ layers

B
The uniqueness of its body plan

C
Type of body symmetry

D
All the above

Solution

An animal phylum is defined on the basis of parameters of which are - the number of germ layers (diploblastic or triploblastic), type of body plan (blind sac pattern, tube within tube pattern), and body symmetry - asymmetry, radial symmetry, and bilateral symmetry.
So, the correct answer is 'All the above'.
Question 8
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Which fungus is used most extensively in biochemical and genetic work?

A
Agaricus

B
Aspergillus

C
Neurospora

D
Clavi

Solution

The fungus used most extensively in biochemical and genetic work is Neurospora because of the following reasons.
1. Neurospora are easy to grow and they have short simple lifestyle so in small expenditure of time we can study more about genetics and biochemistry.
2. They are haploid so we have to only deal with one set of genes which are easy to study because more genes will make more complex result.
So the correct answer is 'Neurospora'.
Question 9
1 / -0

Which of the following is an edible fungus?

A
Mushroom

B
Cabbage

C
Pea

D
None of the above

Solution

Edible mushrooms are fleshy and have edible fruit bodies. They are found either below ground or above ground where they may be picked by hand. Edibility is due to the absence of poisonous effects on humans and desirable taste and aroma.

So, the correct answer is 'So, the correct answer is 'Mushroom'
Question 10
1 / -0

A virion is

A
Infectious virus with nucleic acid and protein coat

B
Infectious nucleated virus

C
Prions

D
Infectious particle with nucleic acid (only RNA) but without protein coat
Solution
- A virion is an infectious form of the virus. It contains genetic material (DNA or RNA) surrounded by the protein coat known as the capsid.
- Viruses do not have nuclei or any other cellular organelles.
- It is a functional virus that has the capacity to infect living tissue.
- Viroids are infectious RNA molecules without protein coats.
- A prion is an infectious abnormally folded protein found in the brain that can lead to many neurodegenerative disorders.
Thus, the correct answer is option A.

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Biological Classification Test - 83

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Biological Classification Test - 83

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Question 1

Karyogamy, plasmogamy and meiosis

Meiosis, plasmogamy and karyogamy

Plasmogamy, karyogamy and meiosis

Meiosis, karyogamy and plasmogamy

Solution

Question 2

Natural system

Artificial system

Practical system

All system

Solution

Question 3

Water

Tree trunks

Decaying logs

Soil

Solution

Question 4

All correct

(ii) and (iii) are correct

(ii), (iv) and (v) are incorrect

(i), (iii) and (iv) are correct

Solution

Question 5

(A)-T, (B)-T, (C)-T

(A)-T, (B)-F, (C)-T

(A)-T, (B)-T, (C)-F

(A)-F, (B)-T, (C)-F

Solution

Question 6

Non-cellular organism

Can be crystalized

Virus contain both DNA and RNA

Mosaic formation, yellowing and vein clearing are common symptoms due to viral infection.

Solution

Question 7

Number of germ layers

The uniqueness of its body plan

Type of body symmetry

All the above

Solution

Question 8

Agaricus

Aspergillus

Neurospora

Clavi

Solution

Question 9

Mushroom

Cabbage

Pea

None of the above

Solution

Question 10

Infectious virus with nucleic acid and protein coat

Infectious nucleated virus

Prions

Infectious particle with nucleic acid (only RNA) but without protein coat

Solution

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