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NEET • BIOLOGY • LIVING WORLD
Living world practice · Hard
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Showing 1-30 of 32 questions
1
Hard
1 of 32
Remembering
+4 | -1
The taxon which includes related species is
View answer and explanation
Correct option: D
Genus
Option D (Genus) is correct because a genus is a group of related species.
2
Hard
2 of 32
Understanding
+4 | -1
Amongst all the kingdoms, the only taxon that
exists in nature as a biologically cohesive unit is
the _____
exists in nature as a biologically cohesive unit is
the _____
View answer and explanation
Correct option: B
Species
Option B is correct because species is the only taxonomic rank that represents a naturally interbreeding population, making it a biologically cohesive unit.
3
Hard
3 of 32
Remembering
+4 | -1
Chromatophores are found in ______
View answer and explanation
Correct option: A
Squids
Option A (Squids) is correct because chromatophores are pigment-containing cells found in squids, allowing them to change color.
4
Hard
4 of 32
Remembering
+4 | -1
Each category of taxonomic hierarchy refers to as a unit of ______.
View answer and explanation
Correct option: D
Classification
Option D (Classification) is correct because each category in the taxonomic hierarchy represents a level of classification.
5
Hard
5 of 32
Understanding
+4 | -1
Which of the following shows the correct example of taxonomic category - Genus?
View answer and explanation
Correct option: A
Potato, tomato and brinjal belong to Solanum
Option A (Potato, tomato and brinjal belong to Solanum) is correct because Solanum is the genus to which potato, tomato, and brinjal belong.
6
Hard
6 of 32
Understanding
+4 | -1
Which of the following statement is not true?
View answer and explanation
Correct option: B
When the external temperature is warm, the superficial
blood vessels constrict to prevent loss of body heat
blood vessels constrict to prevent loss of body heat
Option B is correct because superficial blood vessels dilate, not constrict, in warm temperatures to release body heat through radiation.
7
Hard
7 of 32
Understanding
+4 | -1
Which of the following statements are correct about herbarium?
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because all the statements accurately describe the characteristics and functions of a herbarium.
8
Hard
8 of 32
Understanding
+4 | -1
Which of the following is the correct sequence of the various steps of Herbarium formation?
(1) Drying
(2) Poisoning
(3) Collection
(4) Labelling
(5) Mounting
(6) Deposition
(7) Stitching
(1) Drying
(2) Poisoning
(3) Collection
(4) Labelling
(5) Mounting
(6) Deposition
(7) Stitching
View answer and explanation
Correct option: A
3, 1, 2, 5, 7, 4, 6
Option A (3, 1, 2, 5, 7, 4, 6) is correct because it represents the standard order of steps in herbarium formation: Collection, Drying, Poisoning, Mounting, Stitching, Labelling, and Deposition.
9
Hard
9 of 32
Understanding
+4 | -1
Assertion: Information given on the label of herbarium sheets does not include family.
Reason: Families are characterized on the basis of reproductive features of plant species only.
Reason: Families are characterized on the basis of reproductive features of plant species only.
View answer and explanation
Correct option: D
If both Assertion and Reason are false
Option D (If both Assertion and Reason are false) is correct because the herbarium sheet label *does* include family, and families are characterized by both reproductive and vegetative features.
10
Hard
10 of 32
Understanding
+4 | -1
Choose the correct option w.r.t. living organisms
View answer and explanation
Correct option: B
Technically complicated feature - Consciousness, Defining feature - Cellular organisation
Option B (Technically complicated feature - Consciousness, Defining feature - Cellular organisation) is correct because consciousness is a complex property, and cellular organization is a fundamental characteristic of all living organisms.
11
Hard
11 of 32
Understanding
+4 | -1
[A]: Usually the cells of animals and plants have controlled growth.
[R]: In certain special circumstances the cells begin to grow and multiply continuously, forming tumors.
[R]: In certain special circumstances the cells begin to grow and multiply continuously, forming tumors.
View answer and explanation
Correct option: B
Both A and R are true and R is not the correct explanation of A
Option B (Both A and R are true and R is not the correct explanation of A) is correct because both statements are factually correct, but the reason doesn't explain the controlled growth in normal cells.
12
Hard
12 of 32
Understanding
+4 | -1
What is true for individuals of same species?
View answer and explanation
Correct option: C
Interbreeding
Option C is correct because individuals of the same species are capable of interbreeding and producing fertile offspring.
13
Hard
13 of 32
Understanding
+4 | -1
In scientific name of mango
View answer and explanation
Correct option: B
Author name appears after indica
Option A (Author name appears after indica) is correct because according to binomial nomenclature, the author's name or abbreviation is written after the specific epithet.
14
Hard
14 of 32
Remembering
+4 | -1
The number of species classified in Species Plantarum
View answer and explanation
Correct option: A
5900
Option A (5900) is correct because Linnaeus classified approximately 5900 species in his 'Species Plantarum'.
15
Hard
15 of 32
Understanding
+4 | -1
Assertion(A): Reproduction cannot be an allinclusive defining characteristic of living organisms.
Reason(R): There are many organisms that do not reproduce (mules, sterile worker bees, infertile human couples, etc.).
Reason(R): There are many organisms that do not reproduce (mules, sterile worker bees, infertile human couples, etc.).
View answer and explanation
Correct option: A
Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
Option A is correct because both the assertion and reason are true, and the reason correctly explains why reproduction cannot be an all-inclusive defining characteristic of living organisms.
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16
Hard
16 of 32
Understanding
+4 | -1
In rice and mango, minimum number of common characters are present in which of the following taxonomic categories?
View answer and explanation
Correct option: A
Class
Option A (Class) is correct because organisms in the same class share fewer common characteristics than those in the same genus, order, or family.
17
Hard
17 of 32
Remembering
+4 | -1
Out of 1.7 million species of living organisms
known to us, insects contributes to about
known to us, insects contributes to about
View answer and explanation
Correct option: A
0.7 million
Option A (0.7 million) is correct because insects comprise over half of all known species, approximately 700,000 out of 1.7 million.
18
Hard
18 of 32
Analyzing
+4 | -1
Which of the following does not belong to the same taxonomic family?
View answer and explanation
Correct option: A
Solanum nigrum
Option D (Pisum sativum) is correct because it belongs to the family Fabaceae, while the other three belong to Solanaceae.
19
Hard
19 of 32
Understanding
+4 | -1
Read the following statements and choose the option for the set of all the correct ones.
a. All living organisms grow but growth is not a defining property of living organisms
b. Reproduction is the fundamental characteristic of all living organisms
c. All the living organisms possess metabolic reactions
d. Self-consciousness is seen in most of the animals species
a. All living organisms grow but growth is not a defining property of living organisms
b. Reproduction is the fundamental characteristic of all living organisms
c. All the living organisms possess metabolic reactions
d. Self-consciousness is seen in most of the animals species
View answer and explanation
Correct option: B
(a) and (c )
Option B ((a) and (c)) is correct because growth is not a defining property and all living organisms possess metabolic reactions.
20
Hard
20 of 32
Understanding
+4 | -1
Choose the wrong statement
View answer and explanation
Correct option: B
A museum has preserved plants only
Option B (A museum has preserved plants only) is correct because museums preserve both plants and animals, not just plants.
21
Hard
21 of 32
Understanding
+4 | -1
Assertion: Panthera is a polytypic genera.
Reason: Panthera has specific epithets like leo, tigris and pardus.
Reason: Panthera has specific epithets like leo, tigris and pardus.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
Option A (If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion) is correct because *Panthera* is a polytypic genus (Assertion), and this is because it contains multiple species with their own specific epithets like *leo*, *tigris*, and *pardus* (Reason).
22
Hard
22 of 32
Remembering
+4 | -1
On the basis of nutritionally wild type organism, which does not require any additional growth supplement is known as :-
View answer and explanation
Correct option: C
Prototroph
Option C (Prototroph) is correct because a prototroph is a nutritionally wild-type organism that does not require additional growth supplements.
23
Hard
23 of 32
Remembering
+4 | -1
Animal taxonomists have named the animals according to:
View answer and explanation
Correct option: D
International code for Zoological Nomenclature
Option D (International code for Zoological Nomenclature) is correct because it is the established international standard for naming animals.
24
Hard
24 of 32
Understanding
+4 | -1
A taxon with reference to classification of living organisms
can be defined as
can be defined as
View answer and explanation
Correct option: D
a group of any one rank of organisms
Option D (a group of any one rank of organisms) is correct because a taxon is a taxonomic unit at any level of classification, such as species, genus, family, etc.
25
Hard
25 of 32
Understanding
+4 | -1
Mark the decreasing order of complexity in the given living systems
(A) Cell
(B) Organ
(C) Tissue
(D) Biosphere
(A) Cell
(B) Organ
(C) Tissue
(D) Biosphere
View answer and explanation
Correct option: B
D > B > C > A
Option B (D > B > C > A) is correct because the biosphere is the most complex, followed by organ, then tissue, and finally cell.
26
Hard
26 of 32
Understanding
+4 | -1
Select the correct statements (i-v) regarding taxonomic categories.
(i) Each step or rank in hierarchy is called taxonomic category.
(ii) Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
(iii) Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom, phylum or division, class, order, family, genus and species.
(iv) Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
(i) Each step or rank in hierarchy is called taxonomic category.
(ii) Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
(iii) Taxonomic studies of all unknown organisms have led to the development of common categories like kingdom, phylum or division, class, order, family, genus and species.
(iv) Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
View answer and explanation
Correct option: A
(i) & (ii) only
Option A ((i) & (ii) only) is correct because statements (i) and (ii) are accurate descriptions of taxonomic categories and species definition.
27
Hard
27 of 32
Remembering
+4 | -1
What is the origin centre of potato potato?
View answer and explanation
Correct option: D
Peru
Option D (Peru) is correct because Peru is considered the origin center of the potato.
28
Hard
28 of 32
Remembering
+4 | -1
Ants locate sucrose by
View answer and explanation
Correct option: C
Physical contact with sucrose
Option C (Physical contact with sucrose) is correct because ants primarily locate food sources through direct physical interaction and chemoreception.
29
Hard
29 of 32
Remembering
+4 | -1
The hierarchical arrangement of taxonomic categories in descending order is
View answer and explanation
Correct option: A
Kingdom, phylum, class, order, family, genus, species
Option A (Kingdom, phylum, class, order, family, genus, species) is correct because it represents the correct hierarchical classification from broadest to most specific.
30
Hard
30 of 32
Understanding
+4 | -1
Two different genera are classified in the same taxonomic category family. Which statement is correct about their classification?
View answer and explanation
Correct option: A
The same class, but different species
Option C (The same phylum, but different class) is correct because organisms in the same family must belong to the same phylum and class but different genera and species.
Revision notes and key takeaways
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Key Takeaways
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