Biological Classification
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Five kingdom classification
SubtopicFive kingdom classification under Biological Classification for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Whittaker's Five Kingdom system was based on which of the following evolutionary concepts?
A.Spontaneous generation
B.Phylogenetic relationships
C.Acquired characters
D.Natural selection only
- 2.
The presence of a nuclear membrane is a common feature for which of the following sets of kingdoms?
A.Monera and Protista
B.Protista, Fungi, Plantae, and Animalia
C.Monera, Fungi, and Plantae
D.All five kingdoms
- 3.
The absorptive mode of nutrition is the characteristic feature of which kingdom?
A.Fungi
B.Plantae
C.Animalia
D.Monera
- 4.
Holozoic nutrition, which involves the ingestion of food, is a hallmark of which kingdom?
A.Plantae
B.Animalia
C.Fungi
D.Monera
- 5.
In Whittaker's classification, multicellular heterotrophs with chitin in their cell walls are categorized as:
A.Animals
B.Plants
C.Fungi
D.Protists
- 6.
The three-domain system later proposed a further division of which Whittaker kingdom into two separate domains?
A.Protista
B.Monera
C.Fungi
D.Plantae
- 7.
Which of the following is a major criterion for including an organism in Kingdom Monera?
A.Multicellularity
B.Presence of double-membranous organelles
C.Prokaryotic cell structure
D.Holozoic nutrition
- 8.
Which of the following is a structural difference between a virus and a viroid?
A.Viroids lack the protein coat that is present in viruses.
B.Viruses have circular RNA, while viroids have linear DNA.
C.Viroids are larger and more complex than viruses.
D.Viruses only infect animals, while viroids only infect plants.
- 9.
In the Diatom cell, the silica is embedded in the wall, making it indestructible. What happens to these walls after the cell dies?
A.They accumulate over billions of years to form diatomaceous earth.
B.They are decomposed by specialized deep-sea fungi.
C.They dissolve in seawater due to the high pH.
D.They are recycled by other protists to build their own shells.
- 10.
Why is the classification of Cyanobacteria as 'Blue-green algae' considered a misnomer in modern biological classification?
A.They are prokaryotic (Monera), whereas true algae are eukaryotic (Protista/Plantae).
B.They do not perform photosynthesis like true algae.
C.They lack chlorophyll , which is present in all true algae.
D.They are always multicellular, unlike the mostly unicellular algae.
Download the worksheet for Biological Classification - Five kingdom classification to practice offline. It includes additional chapter-level practice questions.
Salient features and classification of Monera, Protista and Fungi
SubtopicSalient features and classification of Monera, Protista and Fungi under Biological Classification for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Chemosynthetic autotrophic bacteria play a great role in recycling which of the following nutrients?
A.Nitrogen
B.Phosphorus
C.Iron
D.All of these
- 2.
Which of the following organisms are known to have 'stiff cellulose plates' on the outer surface of their cell walls?
A.Chrysophytes
B.Dinoflagellates
C.Euglenoids
D.Slime moulds
- 3.
Large accumulations of dead diatom shells over billions of years form:
A.Coral reefs
B.Diatomaceous earth
C.Red sea
D.Peat
- 4.
What term is used for the multinucleated cytoplasm found in some fungal hyphae that lack septa?
A.Septate
B.Coenocytic
C.Monokaryotic
D.Dikaryotic
- 5.
What happens when a 'dikaryon' fungus undergoes a process to eventually form spores?
A.Karyogamy occurs followed by meiosis.
B.Plasmogamy occurs followed by mitosis.
C.Meiosis occurs followed by karyogamy.
D.Amitosis occurs directly to produce spores.
- 6.
The cell wall of a certain organism is made of cellulose and has two flagella. If the organism undergoes rapid multiplication and makes the sea appear a certain color, it likely belongs to:
A.Chrysophytes
B.Dinoflagellates
C.Euglenoids
D.Slime moulds
- 7.
The parasitic fungi found on mustard leaves belong to which group?
A.Phycomycetes ()
B.Ascomycetes ()
C.Basidiomycetes ()
D.Deuteromycetes ()
- 8.
In the kingdom Monera, the 'Nitrosomonas' and 'Nitrobacter' bacteria are examples of:
A.Photoautotrophs
B.Chemosynthetic autotrophs
C.Saprophytic heterotrophs
D.Parasitic heterotrophs
- 9.
What is the primary distinguishing feature of 'Desmids' within the group Chrysophytes?
A.They are exclusively marine and have two flagella.
B.They are unicellular green algae found in fresh water with symmetrical cell halves.
C.They form large colonies called plasmodia under favorable conditions.
D.They have a proteinaceous cell wall called a pellicle.
- 10.
Members of which kingdom are characterized by an absorptive mode of nutrition and have a body consisting of long, slender thread-like structures?
A.Monera
B.Protista
C.Fungi
D.Plantae
Download the worksheet for Biological Classification - Salient features and classification of Monera, Protista and Fungi to practice offline. It includes additional chapter-level practice questions.
Lichens, Viruses, Viroids and Prions
SubtopicLichens, Viruses, Viroids and Prions under Biological Classification for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Prions are known for being:
A.The largest infectious agents
B.Similar in size to viruses
C.Always beneficial to humans
D.Types of algae
- 2.
Which of the following is NOT categorized as a 'living' entity in the traditional sense because it is inert outside a host cell?
A.Paramecium
B.Virus
C.Amoeba
D.Yeast
- 3.
The genetic material in a viroid is:
A.Free DNA
B.Free RNA
C.Protein-bound DNA
D.Protein-bound RNA
- 4.
A bacteriophage is a:
A.Bacteria that infects viruses
B.Virus that infects bacteria
C.Type of lichen
D.Free-living protein
- 5.
A laboratory analysis is conducted on three unknown sub-microscopic infectious agents (, , and ) to determine their biochemical composition. The results are summarized in the classification key provided below. Which agent correctly identifies the cause of 'Creutzfeldt-Jakob Disease' () in humans?
A.Agent
B.Agent
C.Agent
D.None of the above
- 6.
The relationship in lichens where both partners benefit is an example of:
A.Symbiosis
B.Antibiosis
C.Helotism
D.Predation
- 7.
Which of the following is NOT a characteristic of viroids?
A.They are smaller than viruses.
B.They cause diseases in plants.
C.Their RNA has a high molecular weight.
D.They lack a protein coat.
- 8.
The following flowchart illustrates the biochemical and structural classification of certain non-cellular infectious agents that are treated as exceptions to Whittaker's Five Kingdom system. Based on the characteristics provided in the flowchart, identify the correct nature of Agent 1, Agent 2, and Agent 3.
A.Agent 1: Viroid, Agent 2: Prion, Agent 3: Virus
B.Agent 1: Prion, Agent 2: Viroid, Agent 3: Virus
C.Agent 1: Virus, Agent 2: Viroid, Agent 3: Prion
D.Agent 1: Prion, Agent 2: Virus, Agent 3: Viroid
- 9.
The virus that causes AIDS in humans is a:
A.Bacteriophage
B.Retrovirus
C.Viroid
D.Prion
- 10.
Which of the following statements about the lichen symbiotic relationship is FALSE?
A.The algae prepare food for fungi
B.The fungi provide shelter to the algae
C.The algae absorb mineral nutrients for the fungi
D.The fungi absorb water for the algae
Download the worksheet for Biological Classification - Lichens, Viruses, Viroids and Prions to practice offline. It includes additional chapter-level practice questions.
Kingdom Plantae
SubtopicKingdom Plantae under Biological Classification for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Which of the following groups includes the 'Horsetails'?
A.Bryophytes
B.Pteridophytes
C.Gymnosperms
D.Angiosperms
- 2.
Hydrocolloids like algin are obtained from ________.
A.Red algae
B.Green algae
C.Brown algae
D.Mosses
- 3.
Which of these contains chlorophyll 'a' and 'c'?
A.Green algae
B.Brown algae
C.Red algae
D.Mosses
- 4.
Polysiphonia belongs to which group of Algae?
A.Chlorophyceae
B.Phaeophyceae
C.Rhodophyceae
D.Liverworts
- 5.
Which of the following is a characteristic of dicotyledons?
A.Seeds with a single cotyledon
B.Parallel venation in leaves
C.Trimerous flowers
D.Seeds with two cotyledons
- 6.
In angiosperms, the female gametophyte is also known as the:
A.Nucellus
B.Embryo sac
C.Ovule
D.Carpel
- 7.
Which of the following is NOT a characteristic of Bryophytes?
A.Lack of true roots, stem, or leaves
B.Main plant body is haploid
C.Presence of specialized water-conducting vascular tissues
D.Production of biflagellate antherozoids
- 8.
Regarding the life cycle of Polysiphonia, which of the following is true?
A.It is haplontic.
B.It is diplontic.
C.It is haplo-diplontic.
D.It is triplontic.
- 9.
Heterospory is a significant evolutionary trait. Which of the following pairs of genera exhibit heterospory?
A.Lycopodium and Equisetum
B.Selaginella and Salvinia
C.Dryopteris and Pteris
D.Adiantum and Marsilea
- 10.
Pyrenoids, found in the chloroplasts of most green algae, contain:
A.Protein besides starch
B.Starch besides oil
C.Protein only
D.Glycogen and oil
Download the worksheet for Biological Classification - Kingdom Plantae to practice offline. It includes additional chapter-level practice questions.
Kingdom Animalia
SubtopicKingdom Animalia under Biological Classification for Grade 11 CBSE.
Preview questions (no answers)
- 1.
Which of the following are the most primitive multicellular animals?
A.Protozoans
B.Sponges
C.Cnidarians
D.Ctenophores
- 2.
The 'Cloaca' is a common chamber in amphibians where which systems open?
A.Alimentary and urinary
B.Urinary and reproductive
C.Alimentary, urinary, and reproductive
D.Alimentary and reproductive
- 3.
Water enters through minute pores called 'ostia' into a central cavity in which phylum?
A.Coelenterata
B.Porifera
C.Ctenophora
D.Mollusca
- 4.
Which of the following is a socio-economically important insect?
A.Anopheles
B.Locusta
C.Apis
D.Culex
- 5.
Sea-walnut and Comb-jelly are common names for members of which phylum?
A.Coelenterata
B.Ctenophora
C.Echinodermata
D.Hemichordata
- 6.
Which of the following features is NOT shared by both Aves and Mammals?
A.Warm-blooded nature
B.Four-chambered heart
C.Lungs for respiration
D.Viviparity
- 7.
Which of the following fishes has an electric organ?
A.Trygon
B.Torpedo
C.Pristis
D.Exocoetus
- 8.
Which chordate feature is correctly described for the subphylum Vertebrata?
A.Notochord is persistent throughout life in all vertebrates.
B.Notochord is replaced by a cartilaginous or bony vertebral column in the adult.
C.The nerve cord is ventral and double.
D.Gills are present throughout life in all vertebrates.
- 9.
The 'Cloaca' is a common chamber for which of the following systems in Amphibians?
A.Alimentary canal and Urinary tract only
B.Alimentary canal and Reproductive tract only
C.Alimentary canal, Urinary tract, and Reproductive tract
D.Respiratory and Circulatory systems
- 10.
Which of the following groups of animals is entirely marine?
A.Porifera and Cnidaria
B.Ctenophora and Echinodermata
C.Annelida and Mollusca
D.Arthropoda and Chordata
Download the worksheet for Biological Classification - Kingdom Animalia to practice offline. It includes additional chapter-level practice questions.