CBSE Class 11 Biology Plant Kingdom Worksheet Set B

Question. Which one of the following statements is incorrect?
(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. In which of the following chlorophyll-a and b is present?
(a) Red algae
(b) Yellow algae
(c) Brown algae
(d) Green algae
Answer. D

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 nucleic acid surrounded by protein sheath
Answer. C

Question. The members of Chlorophyceae usually have a rigid cell wall made up of
(a) cellulose (outer layer) and algin (inner layer)
(b) pectose (inner layer) and peptidoglycan (outer layer)
(c) cellulose (inner layer) and pectose (outer layer)
(d) chitin (inner layer) and pectose (outer layer)
Answer. C

Question. Consider the following statements regarding reproduction in class–Chlorophyceae.
I. Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.
II. The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous, anisogamous and oogamous.
Choose the correct option.
(a) Statement I is true, but II is false
(b) Statement I is false, but II is true
(c) Both statements I and II are true
(d) Both statements I and II are false
Answer. C

Question. Volvox, Chlamydomonas, Chara, Ulothrix are the examples of
(a) class–Chlorophyceae (green algae)
(b) class–Rhodophyceae (red algae) and Chlorophyceae
(c) class–Phaeophyceae (brown algae)
(d) class–Cyanophyceae (blue-green algae)
Answer. A

Question. Kelp (branched form) and Ectocarpus (filamentous form) belong to
(a) green algae
(b) brown algae
(c) red algae
(d) blue-green algae
Answer. B

Question. Holdfast, stipe and frond constitute the plant body in case of
(a) Rhodophyceae
(b) Chlorophyceae
(c) Phaeophyceae
(d) All of these
Answer. C

Question. The pairs that do not belong to class–Phaeophyceae are
(a) Ectocarpus and Dictyota
(b) Fucus and Dictyota
(c) Laminaria and Sargassum
(d) Polysiphonia and Gelidium
Answer. D

Question. Consider the following statements about sexual reproduction in brown algae.
I. Sexual reproduction may be oogamous, isogamous or anisogamous.
II. Union of gametes takes place in water or within the oogonium.
III. The gametes are pear-shaped and bear two laterally attached flagella.
Which of the statements given above are correct?
(a) I and II
(b) I and III
(c) II and III
(d) I, II and III
Answer. D

Question.. Consider the following statements.
I. They reproduce asexually by non-motile spores and sexually by non-motile gametes.
II. In this class, sexual reproduction is oogamous and accompanied by complex post-fertilisation developments.
III. The common members are Polysiphonia,Porphyra, Gracilaria and Gelidium.
The above characteristics belong to which class of algae?
(a) Chlorophyceae
(b) Phaeophyceae
(c) Both (a) and (b)
(d) Rhodophyceae
Answer. D

Question. Which one is called amphibian of the plant kingdom?
(a) Polygonum
(b) Casuarina
(c)Wolffia
(d) None of these
Answer. A

Question. Bryophytes are the oldest (most primitive) plant type in terms of evolution, these include
(a) liverworts and mosses
(b) lycopods and mosses
(c) lycopods and liverworts
(d) liverworts and Volvox
Answer. A

Question. The plant body of bryophytes is thallus-like, prostrate or erect and attached to substratum with the help of
(a) unicellular or multicellular root
(b) unicellular or multicellular rhizoids
(c) multicellular roots
(d) unicellular roots
Answer. B

Question. The main plant body of bryophyte is ...A... . It produces ... B... , hence is called as ... C.... .
Fill in the blanks with respect to A, B and C and choose correct option.
(a) A–diploid, B–endospores, C–sporophyte
(b) A–haploid, B–conidia, C–gametophyte
(c) A–diploid, B–spores, C–sporophyte
(d) A–haploid, B–gametes, C–gametophyte
Answer. D
 

Question. Choose the correct statement.
(a) Bryophytes can live in soil, but are dependent on water for sexual reproduction
(b) The sex organs in bryophytes are unicellular
(c) Common example of liverwort is Polytrichum
(d) Common example of moss is Marchantia
A​​​​​​nswer. A
 

Question. Choose the incorrect option for bryophytes.
(a) Archegonium – Flask-shaped female sex organ
(b) Antheridium – Unicellular female gametes
(c) Antherozoids – Biflagellate male gamete
(d) All of the above
Answer. B

Question. Identify the statements that are true for the sporophyte of bryophytes.
I. Sporophyte is not free-living. It is multicellular and is attached to the gametophyte for nourishment.
II. Spores of bryophytes germinate to produce the gametophyte.
III. Meiosis is observed in some cells of sporophyte which produces haploid spores.
Choose the correct option.
(a) I and II
(b) I and III
(c) II and III
(d) I, II and III
Answer. D

Question. Mosses along with lichen are of great ecological importance because
(a) they colonise barren rocks and decompose rock
(b) of their contribution to prevent soil erosion
(c) of their contribution in ecological succession
(d) All of the above
Answer. D

Question. Gemmae are asexual buds, which originate from small receptacles called gemma cups. These are found in
(a) Funaria
(b) Marchantia
(c) Fern
(d) Sphagnum
Answer. B

Question. Choose the correct statement about liverworts.
(a) The antheridium and archegonium produce antherozoid and egg respectively, which fuse during sexual reproduction
(b) Both male and female sex organs may be present on same thalli or different thalli
(c) A sporophyte is formed from the zygote which is differentiated into the foot, seta and capsule
(d) All of the above
Answer. D

Question. Funaria and Marchantia differ from each other because Funaria possesses
(a) ventral canal cell
(b) foot
(c) calyptra
(d) protonema
Answer. D

Question. Protonema is 
(a) haploid and is found in mosses
(b) diploid and is found in liverworts
(c) diploid and is found in pteridophytes
(d) haploid and is found in pteridophytes
Answer. A

Question. In Funaria, tertiary protonema develops into leafy gametophyte.
(a) True
(b) False
(c) Cannot say
(d) Partially true or false
Answer. B

Question. In mosses, vegetative reproduction takes place by
(a) fragmentation and budding in the secondary protonema
(b) gemmae and tubers formation
(c) protonema and endospore formation
(d) gemmae formation
Answer. A

Question.  In a moss, the sporophyte
(a) is partially parasitic on the gametophyte
(b) produces gametes that give rise to the gametophyte
(c) arises from a spore produced from the gametophyte
(d) manufactures food for itself, as well as for the gametophyte
Answer. A

Question. Which of the following plant group is considered as first terrestrial plant to possess vascular tissues xylem and phloem?
(a) Bryophytes
(b) Pteridophytes
(c) Gymnosperms
(d) Angiosperms
Answer. B

Question. Select the correct sequential arrangement of reproductive structures in pteridophytes.
(a) Sporophyll→Strobili→Sporangia→Spore mother cell→Spores
(b) Strobili→Sporophyll→Sporangia→ Spores
(c) Spores→Sporophyll→Sporangia→ Strobili
(d) Spores→Sporangia→Sporophyll→ Strobili
Answer. A

Question. A prothallus is
(a) a structure in pteridophytes formed before the thallus develops
(b) a sporophytic free-living structure formed in pteridophytes
(c) a gametophytic free-living structure formed in pteridophytes
(d) a primitive structure formed after fertilisation in pteridophytes
Answer. C

Question. The sporophytes in pteridophyte,consist of leaf-like appendages called
(a) thalli
(b) sporophylls
(c) megaphylls
(d) sporangia
Answer. B

Question. Heterospory is the production of heterosporous pteridophytes. The heterospores are
(a) haploid and diploid alike spores
(b) large and small spores
(c) diploid and tetraploid alike spores
(d) sexual and asexual spores
Answer. B

Question. Selaginella and Salvinia are considered representing a significant step towards evolution of seed habit because
(a) female gametophyte is free and gets dispersed like seeds
(b) female gametophyte lacks archegonia
(c) megaspores possess endosperm and embryo surrounded by seed coat
(d) embryo develops in female gametophyte which is retained on parent sporophyte
Answer. D

Question. Match the following columns.
Column I                  Column II
A. Psilopsida           1. Oryapteris, Pteris,Adiantum
B. Lycopsida           2. Equisetum
C. Sphenopsida      3. Selaginella
D. Pteropsida         4. Psilotum
Codes
     A B C D
(a) 4 3 2 1
(b) 2 1 4 3
(c) 1 4 3 2
(d) 3 2 1 4
Answer. A

Question. Gymnosperms are characterised by
(a) winged seeds
(b) naked seeds
(c) multiflagellate sperms
(d) seeds inside fruits
Answer. B

Question. The giant redwood tree (Sequoia sempervirens) is a/an 
(a) angiosperm
(b) free fern
(c) pteridophyte
(d) gymnosperm
Answer. D

Question. Microsporangia in gymnosperms are produced
(a) on the middle portion of microsporophyll
(b) on the upperside of microsporophyll
(c) on the middle portion of megasporophyll
(d) at the extreme tip of microsporophyll
Answer. D

Question. The cones bearing megasporophylls with ovules are called
(a) male strobili
(b) female strobili
(c) archegonia
(d) microsporangia
Answer. B

Question. In gymnosperms, the reduced gametophyte is called
(a) endospore
(b) pollen grain
(c) ovule
(d) aplanospore
Answer. B

Question. In gymnosperms, the multicellular female gametophyte is retained within
(a) microsporangium
(b) megasporangium
(c) male gametophyte
(d) archegonia
Answer. B