CBSE Class 11 Biology Plant Kingdom Assignments

Question. Phylogenetic system of classification is based on
(a) morphological features
(b) chemical constituents
(c) floral characters
(d) evolutionary relationships. 
Answer. D

Question. Phenetic classification of organisms is based on
(a) observable characteristics of existing organisms
(b) the ancestral lineage of existing organisms
(c) dendrogram based on DNA characteristics
(d) sexual characteristics.
 Answer. A

Question. A system of classification, in which a large number of traits are considered, is
(a) natural system
(b) phylogenetic system
(c) artificial system
(d) synthetic system.
Answer. A

Question. Phylogenetic classification is one which is based on
(a) overall similarities
(b) utilitarian system
(c) habits of plants
(d) common evolutionary descent. 
Answer. D

Question. System of classification used by Linnaeus was
(a) natural system
(b) artificial system
(c) phylogenetic system
(d) asexual system. 
Answer. B

Question. Artificial system of classification was first used by
(a) Linnaeus
(b) De Candolle
(c) Pliny the Edler
(d) Bentham and Hooker.
Answer. A

Question. Classification given by Bentham and Hooker is
(a) artificial
(b) natural
(c) phylogenetic
(d) numerical. 
Answer. B

Question. Floridean starch has structure similar to
(a) starch and cellulose
(b) amylopectin and glycogen
(c) mannitol and algin
(d) laminarin and cellulose. 
Answer. B

Question. Which of the following pairs is of unicellular algae?
(a) Laminaria and Sargassum
(b) Gelidium and Gracilaria
(c) Anabaena and Volvox
(d) Chlorella and Spirulina 
Answer. D

Question. An example of colonial alga is
(a) Volvox
(b) Ulothrix
(c) Spirogyra
(d) Chlorella.
Answer. A

Question. Which one of the following statements is wrong?
(a) Algae increase the level of dissolved oxygen in the immediate environment.
(b) Algin is obtained from red algae, and carrageenan from brown algae.
(c) Agar-agar is obtained from Gelidium and Gracilaria.
(d) Laminaria and Sargassum are used as food.
Answer. B

Question. Which one of the following statements is wrong?
(a) Chlorella and Spirulina are used as space food.
(b) Mannitol is stored food in Rhodophyceae.
(c) Algin and carrageenan are products of algae.
(d) Agar-agar is obtained from Gelidium and Gracilaria.
Answer. B

Question. Male gametes are flagellated in
(a) Ectocarpus
(b) Spirogyra
(c) Polysiphonia
(d) Anabaena.
Answer. A

Question. Which one of the following is wrong about Chara?
(a) Upper oogonium and lower round antheridium
(b) Globule and nucule present on the same plant
(c) Upper antheridium and lower oogonium
(d) Globule is male reproductive structure 
Answer. C

Question. Which one of the following shows isogamy with non-flagellated gametes?
(a) Sargassum
(b) Ectocarpus
(c) Ulothrix
(d) Spirogyra
Answer. D

Question. Select the wrong statement.
(a) In oomycetes, female gamete is smaller and motile, while male gamete is larger and nonmotile.
(b) Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy.
(c) Isogametes are similar in structure, function and behaviour.
(d) Anisogametes differ either in structure, function or behaviour.
Answer. A

Question. Isogamous condition with non-flagellated gametes is found in
(a) Volvox
(b) Fucus
(c) Chlamydomonas
(d) Spirogyra.
Answer. D

Question. Monoecious plant of Chara shows occurrence of
(a) upper antheridium and lower oogonium on the same plant
(b) upper oogonium and lower antheridium on the same plant
(c) antheridiophore and archegoniophore on the same plant
(d) stamen and carpel on the same plant.
Answer. B

Question. Which one of the following is wrongly matched?
(a) Spirogyra - Motile gametes
(b) Sargassum - Chlorophyll
(c) Basidiomycetes - Puffballs
(d) Nostoc - Water blooms
Answer. A

Question. Algae have cells made up of
(a) cellulose, galactans and mannans
(b) hemicellulose, pectins and proteins
(c) pectins, cellulose and proteins
(d) cellulose, hemicellulose and pectins.
Answer. A

Question. Mannitol is the stored food in
(a) Porphyra
(b) Fucus
(c) Gracillaria
(d) Chara.
Answer. B

Question. If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
(a) Nature of stored food materials in the cell
(b) Structural organization of thallus
(c) Chemical composition of the cell wall
(d) Types of pigments present in the cell
Answer. D

Question. Sexual reproduction in Spirogyra is an advanced feature because it shows
(a) different sizes of motile sex organs
(b) same size of motile sex organs
(c) morphologically different sex organs
(d) physiologically differentiated sex organs.
Answer. D

Assertion-Reasoning MCQs

Direction - Each of these questions contains two statements Assertion (A) and Reason (R). Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes
(a), (b), (c) and (d) given below.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true

Question. Assertion (A) Artificial system of classification separated closely related species.
Reason (R) Artificial system gave equal weightage to vegetative and sexual characteristics.
Answer. A

Question. Assertion (A) Algae are the primary producers of many food cycles.
Reason (R) Half of the total carbon dioxide-fixation on earth is carried out by algae.
Answer. B

Question. Assertion (A) Algae show only isogamous type of reproduction.
Reason (R) In algae, gametes can never be non-flagellated.
Answer. C

Question. Assertion (A) Red colour of Rhodophyta is due to the abundant formation of r-phycoerythrin.
Reason (R) r-phycoerythrin is able to absorb blue-green wave length of light and reflect red colour.
Answer. A

Question. Assertion (A) Red algae contributes in development of coral reefs.
Reason (R) Red algae secrete and deposit calcium carbonate over their walls.
Answer. A

Question. Assertion (A) Chlorella and Spirulina are used as a food supplement by space travellers.
Reason (R) Chlorella and Spirulina are unicellular algae.
Answer. B

Question. Assertion (A) Bryophytes are the amphibians of plant kingdom.
Reason (R) They are found in swamps and the areas, where water and land meet.
Answer. A

Question. Assertion (A) Bryophytes are a class of kingdom–Plantae.
Reason (R) Algae, fungi, lichens and mosses are included in bryophytes.
Answer. C

Question. Assertion (A) The life cycle of Funaria is called diplo-haplontic.
Reason (R) In Funaria, there is alternation of haploid gametophytic and diploid sporophytic phases, one becoming parent of the other.
Answer. A

Question. Assertion (A) Lycopodium and Selaginella are heterosporous.
Reason (R) In heterosporous condition, two kinds of spores are produced by the plant.
Answer. D

Question. Assertion (A) Production of two types of spores is a pre-requisite of seed habit.
Reason (R) In pteridophytes,Lycopodium is precursor of seed habit.
Answer. C

Question. Assertion (A) Heterospory and retention of female gametophyte are responsible for origin of seed habit in Selaginella.
Reason (R) Psilotum is a living fossil.
Answer. B

Question. Assertion (A) Fertilisation in Cycas is called zooidogamy.
Reason (R) Fertilisation in Cycas takes place by the formation of pollen tube.
Answer. B

Question. Assertion (A) The leaves in gymnosperms are well-adapted to withstand extremes of temperature, humidity and wind.
Reason (R) Unlike bryophytes and pteridophytes, in gymnosperms, the male and female gametophytes do not have an independent free-living existence.
Answer. B

Question. Assertion (A) Gymnosperms do not produce fruit.
Reason (R) Ovules of gymnosperms are enclosed within the ovaries.
Answer. C

Case Based MCQs

Direction Read the following and answer the questions that follow

Algae are diverse group of aquatic organisms that have the ability to conduct photosynthesis. They are unicellular or multicellular and undifferentiated organisms that occur in variety of forms and sizes. Algae belong to a polyphyletic group, i.e. the organisms of this group are not necessarily related to each other. Based on the pigment, composition and reserved food material, algae has been divided into three major classes, viz. Chlorophyceae, Phaeophyceae and Rhodophyceae.
The members of these classes also differ in cell wall composition, stored food material, body structure, mode of reproduction, etc.

Question. A representative organism of class- Rhodophyceae is
(a) Spirogyra
(b) Fucus
(c) Polysiphonia
(d) Chlorella
Answer. C

Question. Multicellular, saline forms are found in
(a) Rhodophyceae
(b) Chlorophyceae
(c) Phaeophyceae
(d) All of the above
Answer. A

Question. Stored food material in class–Phaeophyceae is
(a) mannitol and laminarin
(b) floridean starch
(c) pyrenoids
(d) All of the above
Answer. A

Question. Cell wall of Porphyra (red algae) contains
(a) cellulose
(b) pectins
(c) polysulphate esters
(d) All of these
Answer. D

Question. Consider the following statements.
I. Large amounts of hydrocolloids are produced by certain marine red and brown algae.
II. Algin and carrageenan are commercially used as water holding materials.
Choose the correct option.
(a) Statement I is correct, but II is incorrect
(b) Statement I is incorrect, but II is correct
(c) Both statements I and II are correct
(d) Both statements I and II are incorrect
Answer. C

Identify the given bryophyte and answer the questions as follows

Question. Which of the following statements are correct for the given bryophyte species above.
I. The given diagram represent Sphagnum gametophyte.
II. The given species is a liverwort.
III. It provides peat.
IV. Scales and elaters are not found in it.
Codes
(a) II and III
(b) I and IV
(c) II, III and IV
(d) I, III and IV
Answer. D

Question. A bryophyte found in dry habitat is
(a) Polytrichum
(b) Marchantia
(c) Riccia
(d) All of these
Answer. A

Question. The thallus of bryophytes
(a) possesses roots
(b) bears very small leaves
(c) is more differentiated than that of algae
(d) All of the above
Answer. C

Question. The female sex organ in bryophytes is
(a) conspicous and reduced
(b) flask-shaped structure of thallus
(c) called sporophyll
(d) Both (a) and (b)
Answer. B

Question. Marchantia is a bryophyte used to cure
(a) lung infection
(b) skin rashes
(c) joint pain
(d) All of these
Answer. A

Direction Read the following and answer the questions that follow

Pteridophytes are primitive seedless vascular plants. Haeckel (1860) called these groups of plants as ‘Pteridophytes’ because of their pinnate or feather like fronds (leaves). These shade loving plants are few centimeters to 20 m long. The plant body of pteridophytes is differentiated into true root, stem and leaves which are either small or large. They also possess well-differentiated vascular tissues, i.e. xylem and phloem. Most of the pteridophytes are homosporous with few exceptional heterosporous species.
The sporophyte produces spores and gametophyte bears antheridia and archegonia.

Question. An aquatic pteridophyte is
(a) Azolla
(b) Salvinia
(c) Marsilea
(d) All of these
Answer. A

Question. Macrophylls are found in
(a) ferns
(b) Selaginella
(c) Equisetum
(d) All pteridophytes
Answer. A

Question. Selaginella possesses
(a) strobili
(b) heterospores
(c) sporophytic plant body
(d) All of the above
Answer. D

Question. Pteridophytes are also known as
(a) cryptogams
(b) vascular cryptogams
(c) amphibious plants
(d) phanerogams
Answer. B

Question. Assertion (A) In pteridophytes zygote produces a multicellular sporophyte.
Reason (R) Sporophyte is the dominant phase in life cycle of pteridophytes.
Choose the correct option.
(a) Statement I is correct, but II is incorrect
(b) Statement I is incorrect, but II is correct
(c) Both statements I and II are correct
(d) Both statements I and II are incorrect
Answer. B

Identify the given figure of a pteridophyte species and answer the questions that follow

Question. Choose the correct option for the match about the labels A, B and C in the above given figure.
(a) A— Strobilus
(b) B—Internode
(c) C—Roots
(d) All of these
Answer. A

Question. In pteridophytes, phloem is with
(a) sieve cells
(b) sieve tubes
(c) companion cells
(d) bast fibres
Answer. A

Question. Pteridophytes mostly occur in
(a) cool, damp and shady places
(b) dry and humid areas
(c) hot and sunny places
(d) freezing temperatures
Answer. A

Question. Which pteridophyte is called as horsetail?
(a) Equisetum
(b) Lycopodium
(d) Marsilea
(d) Selaginella
Answer. A

Question. Which is wrong about pteridophytes?
(a) Gametophytic phase is dominant
(b) Sporophytic phase is dominant
(c) Gametophyte is independent
(d) Rhizoids are attached to pinnae
Answer. A

Question. The phylogenetic classification was put forth by:
(a) Carolus Linnaeus
(b) Aristotle
(c) Adolf Engler and Karl Prantl
(d) Theophrastus
Answer. C

Question. Cyanobacteria is referred to as blue green algae due to presence of
(a) Chlorophyll a
(b) Xanthophyll
(c) Chlorophyll b
(d) Phycocyanin
Answer. A

Question. Evolutionary history of an organism is known as:
(a) Phylogeny
(b) Ancestry
(c) Palaneotology
(d) Ontogeny
Answer. A

Question. ‘Ordines Anomali’ of Bentham & Hooker includes:
(a) Seed plant showing abnormal form of growth and development.
(b) Plant represented only in fossil state.
(c) Plants described in the literature, but which Bentham & Hooker did not see in original.
(d) A few orders which could not be placed satisfactorily in the classification.
Answer. D

Question. Cytotaxonomy is based on
(a) Chemical constituents
(b) Morphological characters
(c) Structure and behaviour of chromosomes
(d) Both (a) and (b)
Answer. C

Question. Tracheophyta consists of:
(a) Pteridophytes, gymnosperms and angiosperms
(b) Pteridophytes only
(c) Gymnosperms and angiosperms
(d) Bryophytes only
Answer. A

Question. Which of these is mismatched?
(a) Bryon - liverworts
(b) Kryptos - concealed
(c) Gymno - naked
(d) Phaneros - visible
Answer. A

Question. Match the column:
    I                             II
(a) Microspermae      1. Alismaceae
(b) Epigynae             2. Liliaceae
(c) Calycinae            3. Iridaceae
(d) Apocarpae          4. Orchidaceae
(d) Coronariae          5. Palmae
(a) A-2 B-3 C-4 D-5 E-1
(b) A-4 B-3 C-5 D-1 E-2
(c) A-3 B-4 C-5 D-1 E-2
(d) A-1 B-2 C-3 D-4 E-5
Answer. B

Question. Trichoderma erythrium which gives colour to red sea is:
(a) Green alga
(b) Blue - Green alga
(c) Red alga
(d) Brown alga
Answer. B

Question. Algae which forms motile colony is:
(a) Volvox
(b) Nostoc
(c) Spirogyra
(d) Chlamydomonas
Answer. A

Question. Non - motile, greatly thickened, asexual spore in Chlamydomonas is:
(a) Carpospores
(b) Aplanospores
(c) Akinetes
(d) Hypnospores
Answer. D

Question. The cell wall of algae is chemically composed of:
(a) Hemicellulose, pectins, proteins
(b) Chitin
(c) Cellulose, galactans, Mannan
(d) Pectins, cellulose, proteins
Answer. C

Question. Pyrenoids are made up of:
(a) Core of starch surrounded by sheath of protein
(b) Core of protein surrounded by fatty sheath
(c) Proteinaceous centre and starchy sheath
(d) Core of nuclei acid surrounded by protein sheath
Answer. C

Question. About 7% of total world production of iodine is obtained by which algae?
(a) Ulothrix
(b) Polysiphonia
(c) Spirogyra
(d) Laminaria
Answer. D

Question. Spirogyral lateral conjugation takes place in:
(a) Heterosporous species
(b) Homosporous species
(c) Heterothallic species
(d) Homothallic species
Answer. D

Question. Zygote of Spirogyra produces four haploid nuclei in which:
(a) One is functional
(b) Two are functional
(c) Three are functional
(d) All are functional
Answer. A

Question. Which of the following is known as Pond Silk?
(a) Spirogyra
(b) Ulothrix
(c) Nostoc
(d) Anabaena
Answer. A

Question. A natural antibiotic is provided by:
(a) Chlorella
(b) Ulothrix
(c) Dictyota
(d) Chlamydomonas
Answer. A

Question. Meiosis in Spirogyra, Ulothrix, Chlamydomonas and most of the algae / thallophyta is:
(a) Sporic
(b) Zygotic
(c) Gametic
(d) Unequal
Answer. D

Question. A group of plants which are autotrophs their sex organsm are non-jacketed and whose zygotes secretes thick wall are called:
(a) Phycophytes
(b) Lichens
(c) Bryophytes
(d) Thallophytes
Answer. D

Question. Ulothrix releases zoospore during:
(a) Evening
(b) Morning
(c) Night
(d) Noon
Answer. B

Question. Algae known for biological activity bioluminescence:
(a) Spirogyra
(b) Chlorella
(c) Cyclotella
(d) Noctiluca
Answer. D

Question. Which algae is chew as tobacco in Scotland?
(a) Porphyra
(b) Rodimenia palmata
(c) Chlorella
(d) Spirogyra
Answer. B

Question. Phycology is the study of:
(a) Algae
(b) Fungi
(c) Bryophytes
(d) Lichens
Answer. A

Question. Which is Mermaid’s tresses?
(a) Nostoc
(b) Ulothrix
(c) Anabaena
(d) Spirogyra
Answer. D

Question. Moss protonema can be differentiated from filamentous alga in:
(a) Long rhizoids
(b) Oblique septa
(c) Coenocytic nature
(d) Absence of chloroplasts
Answer. B

Question. Ulothrix is:
(a) Nonmotile colonial alga lacking reproductive stages
(b) Filmaentous alga with nonflagellated reproductive stages
(c) Membranous alga producing zoospores
(d) Filamentous alga with flagellated reproductive stages
Answer. D

Question. ‘Nonflagellate’ gametes occur in:
(a) Ulothrix
(b) Funaria
(c) Spirogyra
(d) Selaginella
Answer. C

Question. Which of the following algae are used by space travellers as food suppliments?
(a) Gracilaria, Gelidium
(b) Volvox, Ulothrix
(c) Spirogyra, Kelps
(d) Spirulina, Chlorella
Answer. D

Question. During asexual reproduction, in most of brown algae,zoospores are produced which are:
(a) Elongated with no flagella
(b) Elongated with one flagella
(c) Pear-shaped with one flagella
(d) Pear-shaped with two flagella
Answer. D

Question. Volvox and Polysiphonia are members of algal class, A and B respectively. Which of the following statement is correct?
(a) Cellulose and algin are cell wall components of members of (a)
(b) Floridean starch is stored material in (b)
(c) Chlorophyll a, c and fucoxanthin are the photosynthetic pigments found in class (a)
(d) Two unequal flagella are found in members of (b)
Answer. B

Question. Match the following:
(a) Red algae           1. Marchantia
(b) Liverworts          2. Pinus
(c) Walking fern       3. Polysiphonia
(d) Gymnosperm     4. Adiantum
(a) A-3 B-4 C-1 D-2
(b) A-1 B-2 C-3 D-4
(c) A-3 B-1 C-4 D-2
(d) A-1 B-1 C-4 D-3
Answer. C

Question. Elaters are absent in
(a) Funaria
(b) Marchantia
(c) Pellia
(d) Porella
Answer. A

Question. Calyptra develops from
(a) Ventral wall of oogonium
(b) Ventral wall of archegonium
(c) Outgrowth of gametophyte
(d) Neck wall of archegonium
Answer. B

Question. Largest moss is:
(a) Pogonatum
(b) Funaria
(c) Dawsonia
(d) Polytrichum
Answer. C

Question. Which of the following is known as a “bog moss”?
(a) Polytrichum
(b) Funaria
(c) Sphagnum
(d) Porella
Answer. C

Question. Retort cells occurs in
(a) Funaria
(b) Pogonatum
(c) Porella
(d) Sphagnum
Answer. D

Question. Positive evidence of aquatic ancestary of bryophytes is indicated by
(a) Ciliated sperms
(b) Gametophytic body
(c) Biflagellate gametes
(d) Paristomial teeth
Answer. A

Question. In capsule of moss act as shock absorbers
(a) Trabeculae
(b) Peristone teeth
(c) Seta
(d) Annulus
Answer. A

Question. Mosses are attached to substratum by
(a) Roots
(b) Capsule
(c) Rhizoids
(d) Main axis
Answer. C

Question. Mosses occur in moist places because they
(a) Cannot grow on land
(b) Do not need sunlight for photo synthesis
(c) Lack vascular tissue
(d) Lack root and stomata
Answer. C

Question. Number of peristomial teeth in moss is
(a) 16+16
(b) 16+32
(c) 8+16
(d) 32+32
Answer. A

Question. Which of the following propagates through leaf-tip?
(a) Walking fern
(b) Sprout - leaf plant
(c) Marchantia
(d) Moss
Answer. A

Question. “Sanjeevani booti” is
(a) Selaginella kraussiana
(b) Selaginella chrysocaculos
(c) Selaginella bryopteris
(d) None of these
Answer. D

Question. Ancestors of land plants/bryophytes were
(a) Bryophytes
(b) Brown algae
(c) Red algae
(d) Green algae
Answer. B

Question. Incorrect about Marchantia is :
(a) Sporophyte is differentiated into foot, seta and capsule
(b) It can asexually reproduce through gemmae
(c) Gametophyte as protonema stage
(d) Flagellated antherozoids are produced
Answer. C

Question. Spores are liberated only after decay and decomposition of thallus in:
(a) Riccia
(b) Anthoceros
(c) Marchantia
(d) Funaria
Answer. A

Question. Bryophytes are also called amphibians of the plant kingdom because
(a) They require water to complete their life cycle
(b) They require land to complete their life cycle
(c) They require both land and water for survive
(d) They require only marine water to complete their life cycle
Answer. C

Question. Apophysis occurs in:
(a) Mosses
(b) Pteridium
(c) Apocyanaceae
(d) Marchantia
Answer. A

Question. Club moss belongs to
(a) Algae
(b) Pteridophytes
(c) Fungi
(d) Bryophyta
Answer. B