NEET 2025 MCQ with Answer Explanation : “The Living World”.

31. Which of the following is the correct hierarchy in taxonomy?
    a) Kingdom > Class > Order > Phylum > Family
    b) Kingdom > Phylum > Class > Order > Family > Genus > Species
    c) Phylum > Class > Kingdom > Family > Genus
    d) Class > Phylum > Kingdom > Family > Genus

Answer: b) Kingdom > Phylum > Class > Order > Family > Genus > Species

Explanation:
The correct taxonomic hierarchy follows this sequence: Kingdom, Phylum, Class, Order, Family, Genus, and Species.

32. Which of the following kingdoms includes only prokaryotic organisms?
    a) Monera
    b) Protista
    c) Fungi
    d) Plantae

Answer: a) Monera

Explanation:
Kingdom Monera includes all prokaryotic organisms, such as bacteria, which lack a defined nucleus and membrane-bound organelles.

33. A scientist observing cells under a microscope notices the absence of a well-defined nucleus. The cells most likely belong to which kingdom?
    a) Fungi
    b) Plantae
    c) Animalia
    d) Monera

Answer: d) Monera

Explanation:
Cells without a well-defined nucleus are characteristic of prokaryotes, which belong to the kingdom Monera. Examples include bacteria.

34. In binomial nomenclature, the first part of the name represents the:
    a) Family
    b) Species
    c) Order
    d) Genus

Answer: d) Genus

Explanation:
In binomial nomenclature, the first part of the name refers to the genus, and the second part refers to the species. For example, in Homo sapiens, Homo is the genus.

35. Which of the following kingdoms includes both autotrophs and heterotrophs?
    a) Plantae
    b) Animalia
    c) Monera
    d) Fungi

Answer: c) Monera

Explanation:
The kingdom Monera includes both autotrophs (organisms that produce their own food, like cyanobacteria) and heterotrophs (organisms that depend on others for food, like some bacteria).

36. The term “species” refers to a group of organisms that:
    a) Can live in the same habitat
    b) Can interbreed and produce fertile offspring
    c) Have the same physical appearance
    d) Have the same genetic makeup

Answer: b) Can interbreed and produce fertile offspring

Explanation:
A species is defined as a group of organisms that can interbreed and produce fertile offspring. It is the fundamental unit of biological classification.

37. Which of the following is NOT a feature of fungi?
    a) Multicellular
    b) Autotrophic
    c) Heterotrophic
    d) Presence of cell walls made of chitin

Answer: b) Autotrophic

Explanation:
Fungi are heterotrophic organisms, meaning they obtain their nutrients by absorbing organic matter. They are not autotrophic (do not produce their own food).

38. Which one of the following is a correct definition of growth in living organisms?
    a) An increase in size due to accumulation of materials
    b) A reversible change in body form
    c) Increase in number of individuals
    d) Permanent and irreversible increase in the size and mass of an organism

Answer: d) Permanent and irreversible increase in the size and mass of an organism

Explanation:
Growth in living organisms is defined as a permanent and irreversible increase in size and mass, often due to cell division and enlargement.

39. In the five-kingdom system of classification, which kingdom consists of organisms that are unicellular and eukaryotic?
    a) Protista
    b) Monera
    c) Fungi
    d) Animalia

Answer: a) Protista

Explanation:
Kingdom Protista includes unicellular eukaryotes, such as amoeba and algae. Monera consists of unicellular prokaryotes, while Fungi and Animalia are multicellular.