Taxonomic categories -

Biology - Taxonomic categories

This topic explains the NCERT-based hierarchical classification of organisms from species to kingdom based on similarities and differences.
All MCQs below this topic are strictly NCERT-based and focus on taxonomic hierarchy and ranks.

1 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Why does classification become difficult at higher taxonomic ranks?

1. Increase in similarities

2. Fewer shared characters

3. Absence of fossils

4. Lack of organisms

2 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which character is MOST useful in placing organisms into higher taxonomic categories?

1. Habitat

2. Economic value

3. Aggregated morphological characters

4. Local names

3 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

In the hierarchy, as we move from genus to family, what happens?

1. Morphological differences disappear

2. Diversity increases

3. Number of organisms decreases

4. Similarities increase

4 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which statement correctly describes a taxon?

1. Any artificial group made for convenience

2. A group with no evolutionary significance

3. A group based only on habitat

4. A rank in the taxonomic hierarchy representing a biological entity

5 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

The term “taxa” can represent:

1. Only species

2. Categories at all levels

3. Only family

4. Only genus

6 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxonomic studies require information about:

1. External structure only

2. Internal structure only

3. Ecological data only

4. All of the above

7 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Early classification by humans was based on:

1. Uses of organisms

2. Genetic similarity

3. Cell structure

4. Evolution

8 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which of the following is used in modern taxonomy?

1. External characters only

2. Habitat only

3. Size of organism

4. Cell structure and development

9 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which decreases from species to kingdom?

1. Common characteristics

2. Area of distribution

3. Diversity

4. Number of organisms

10 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxonomic category compulsory for all organisms is:

1. Class

2. Species

3. Phylum

4. Division

11 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Main purpose of taxonomic hierarchy is:

1. Economic grouping

2. Artificial grouping

3. Increasing species count

4. Scientific organization of life forms

12 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxonomy includes:

1. . Naming only

2. Classification only

3. Study of fossils

4. Identification, nomenclature and classification

13 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Maximum evolutionary divergence is seen at:

1. Species

2. Genus

3. Kingdom

4. Family

14 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxon that includes cats and lions together is:

1. Order

2. Class

3. Family

4. Genus

15 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Correct hierarchy for humans is:

1. Mammalia → Homo → Primata → Hominidae

2. Homo → Primata → Mammalia → Hominidae

3. Hominidae → Homo → Mammalia → Primata

4. Homo → Hominidae → Primata → Mammalia

16 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which best represents a true taxon?

1. Flying animals

2. Aquatic plants

3. Tall trees

4. Insects

17 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Most useful taxonomic level for field identification is:

1. Kingdom

2. Phylum

3. Species

4. Class

18 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which statement is INCORRECT?

1. Taxa are biological entities

2. Species is an artificial category

3. Higher ranks share fewer characters

4. Classification follows hierarchy

19 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which rank shows increase in number but decrease in similarity?

1. Species → Genus

2. Genus → Family

3. Family → Order

4. All of the above

20 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Correctly matched taxon is:

1. Felidae – Order

2. Mammalia – Class

3. Primata – Family

4. Chordata – Class

21 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion (A):
Wheat and mango belong to the same class.

Reason (R):
Both wheat and mango are angiosperms.

1. . Both A and R are true and R is the correct explanation of A

2. Both A and R are true but R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

22 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion: Order Carnivora includes both Felidae and Canidae.
Reason: Families grouped under an order share aggregated characters.

1. Both A and R are true and R is the correct explanation of A

2. Both A and R are true but R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

23 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion: Species is the lowest taxonomic category.
Reason: Species includes organisms with maximum similarities.

1. Both true, R doesn’t explain A

2. A false, R true

3. Both true, R explains A

4. A true, R false

24 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Plant equivalent of phylum is:

1. Order

2. Kingdom

3. Division

4. Class

25 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which is NOT a criterion for modern taxonomy?

1. Development process

2. Economic importance

3. Internal structure

4. External structure

26 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Potato and brinjal are placed in the same genus because they share:

1. Same species

2. Same family only

3. More similarities with each other than with other genera

4. Same order only

27 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxon has the least number of common characters?

1. Species

2. Genus

3. Family

4. Kingdom

28 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxonomic rank is always italicised in scientific naming?

1. Family

2. Genus

3. Species

4. Genus and species

29 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

. Which organism belongs to order Diptera?

1. Man

2. Mango

3. Wheat

4. Housefly

30 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Housefly and human differ at which highest common level?

1. Kingdom

2. Phylum

3. Class

4. Order

31 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which pair belongs to the same division?

1. Lion and Wheat

2. Man and Housefly

3. Housefly and Mango

4. Mango and Wheat

32 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which hierarchy shows decreasing similarities?

1. Kingdom → Species

2. Species → Kingdom

3. Genus → Species

4. Family → Genus

33 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Correct sequence from lower to higher taxon is:

1. Genus → Species → Family → Order

2. Family → Genus → Species → Order

3. Species → Genus → Family → Order

4. Species → Family → Genus → Order

34 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion (A):
Genus Panthera is different from genus Felis.

Reason (R):
Panthera and Felis belong to different families.

1. Both A and R are true and R is the correct explanation of A

2. Both A and R are true but R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

35 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion (A):
Classification becomes more complex at higher taxonomic levels.

Reason (R):
Similarities among organisms decrease at higher taxonomic levels.

1. Both A and R are true but R is not the correct explanation of A

2. A is false but R is true

3. Both A and R are true and R is the correct explanation of A

4. A is true but R is false

36 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxon	Rank
a. Mammalia	1. Phylum
b. Chordata	2. Class
c. Primata	3. Order
d. Felidae	4. Family

1. a-3, b-1, c-2, d-4

2. a-2, b-3, c-1, d-4

3. a-1, b-2, c-3, d-4

4. a-2, b-1, c-3, d-4

37 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Column I	Column II
a. Solanum	1. Felidae
b. Panthera	2. Solanaceae
c. Homo	3. Hominidae
d. Felis	1. Felidae

1. a–1, b–2, c–3, d–1

2. a–2, b–3, c–1, d–1

3. a–3, b–1, c–2, d–1

4. a–2, b–1, c–3, d–1

38 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion: Order is a higher category than family.
Reason: Order includes families sharing a few common characters.

1. A false, R true

2. A true, R false

3. Both true, R doesn’t explain A

4. . Both true, R explains A

39 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Select the correct statements regarding family:

Family includes related genera
Family shows more similarity than genus
Family is based on vegetative and reproductive characters

1. 1 only

2. 2 and 3 only

3. 1 and 3 only

4. All

40 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which statements about genus are correct?

Genus is a group of related species
Genus shows more similarity than family
Genus is below species

1. 1 and 2 only

2. 1 only

3. 2 and 3 only

4. All

41 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Choose the correct statements:

Taxonomic hierarchy is linear
Each taxon represents a rank
Categories are biological entities

1. . 1 and 3 only

2. 2 and 3 only

3. 1 and 2 only

4. All

42 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxonomic category is based on maximum number of aggregated characters?

1. Species

2. Genus

3. Family

4. Order

43 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which of the following pairs belong to the same family?

1. Dog and Cat

2. Lion and Tiger

3. Wheat and Mango

4. Man and Monkey

44 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxonomic category was introduced only to facilitate classification and not present originally?

1. Species

2. Genus

3. Kingdom

4. Sub-categories

45 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which statement best explains why species is a real biological entity?

1. Species includes organisms with fundamental similarities

2. Species contains many genera

3. Species is based only on morphology

4. Species is an artificial taxonomic rank

46 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxonomic rank is most specific in identifying an organism?

1. Family

2. Genus

3. Species

4. Order

47 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion (A):
Families have fewer similarities than genera.

Reason (R):
Families are based on aggregates of characters.

1. Assertion is false but Reason is true

2. Assertion is true but Reason is false

3. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

4. Both Assertion and Reason are true and Reason is the correct explanation of Assertion

48 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Housefly belongs to which phylum?

1. Chordata

2. Arthropoda

3. Mollusca

4. Annelida

49 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which of the following pairs belong to the same order?

1. Mango and Wheat

2. Man and Housefly

3. Lion and Cat

4. Wheat and Rice

50 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

As we move from species to kingdom:

1. Differences decrease

2. Common characters decrease

3. Relationship becomes clearer

4. Similarities increase

51 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Column I	Column II
a. Panthera	1. Felidae
b. Solanum	2. Solanaceae
c. Homo	3. Hominidae
d. Felis	1. Felidae

1. a–1, b–2, c–3, d–1

2. a–2, b–1, c–3, d–1

3. a–3, b–2, c–1, d–1

4. a–1, b–3, c–2, d–1

52 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Assertion (A): Genus includes closely related species.
Reason (R): Species within a genus show more similarities than species of other genera.

1. Both A and R are true and R explains A

2. A true, R false

3. A false, R true

4. Both true but R does not explain A

53 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Select the correct statements regarding species:

1.Species is the lowest category

2.Members show fundamental similarities

3.Species is above genus

1. 2 and 3 only

2. 1 only

3. 1 and 2 only

4. All

54 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which of the following statements are correct?

Classification is a single-step process
Taxonomic hierarchy consists of multiple ranks
Each rank is called a taxon

1. 2 and 3 only

2. . 1 and 2 only

3. 1 and 3 only

4. All are correct

55 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Insects are placed under a separate taxonomic category mainly because they have:

1. Wings

2. Three pairs of jointed legs

3. Exoskeleton

4. . Compound eyes

56 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Which taxonomic rank includes organisms with maximum similarities?

1. Species

2. Genus

3. Family

4. Order

57 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxa are best described as:

1. Distinct biological entities

2. Morphological aggregates

3. Artificial groupings

4. Ecological units

58 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

Taxonomic category is also known as:

1. Group

2. Rank

3. Population

4. Class

59 / 59

Category: Biology - The living World

Tags: taxonomic categories

1 points

The correct ascending order of taxonomic hierarchy is:

1. Species → Genus → Family → Order → Class → Phylum → Kingdom

2. Kingdom → Phylum → Class → Order → Family → Genus → Species

3. Genus → Species → Family → Order → Class → Kingdom

4. Species → Family → Genus → Order → Class → Phylum

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