Plant Kingdom Class 11 Biology Important Questions

Objective Questions

Question. Which of the following is correct about sexual reproduction in brown algae?
(a) Sexual reproduction may be isogamous, anisogamous, oogamous
(b) In isogamy and anisogamy fertillzation is external
(c) In oogamy fertillisation occurs in oogonium
(d) All are correct

Question. Chl a + chl d + r-phycoerythrin are the pigment members in
(a) Rhodophyceae
(b) Phaeophyceae
(c) Chlorophyceae
(d) Cyanophyceae

Question. Porphyra and Polysiphonia belong to
(a) Chlorophyceae
(b) Rhodophyceae
(c) Xanthophyceae
(d) Phaecophyceae

Question. Bryophytes include
(a) Mosses
(b) Lycopods
(c) Horse tail
(d) Liverworts + mosses

Question. Bryophytes are called amphibians of plant kingdom because
(a) They are found in only water
(b) Plants live in soil but are dependent on water for sexual reproduction
(c) It needs water for spore formation
(d) Water is essential for its survival

Question. The plant body of bryophytes is thallus like and prostate or erect and attached to substratum by
(a) Unicellular roots
(b) Multicellular roots
(c) Unicellular or multicellular rhizoids
(d) Adhesive

Question. The gametophytes in bryophytes produce biflagellate gametes in ______ and produce ovum in
(a) Antheridium, carpogonium
(b) Anther, ovary
(c) Archaegonium, antheridium
(d) Antheridium, archaegonium

Question. Which is the prominent phase in life cycle of bryophytes?
(a) Gametophyte
(b) Sporophyte
(c) Seta
(d) Sporangium

Question. Choose the incorrect statement about bryophyte
(a) Zygote does not undergo meiosis immediately
(b) Zygote produces embryo which changes into sporophyte
(c) Bryophytes are of little economic importance
(d) Bryophytes are of great economic importance

Question. Sphagnum is also called
(a) Bog or peat moss
(b) Club moss
(c) Spike moss
(d) Reindeer moss

Question. Algae are
(a) Chlorophyllous autotrophs
(b) Thalloid
(c) Both
(d) Archegoniate

Question. Asexual reproduction occurs by production of different types of spores in algae. The most common type of spore is
(a) Aplanospore
(b) Zoospore
(c) Hypospore
(d) Chalmydomonas

Question. In algae we find
(a) Isogamy
(b) Anisogamy
(c) Oogamy
(d) All

Question. Oogamy is seen in
(a) Volvox
(b) Fucus
(c) Both
(d) Spirogyra

Question. Match the following

Column – I	Column – II
A. Ulothrix	I. Unicellular
B. Spirogyra	II. Filamentous
C. Chlamydomonas	III. Colonial form
D. Volvox	IV. Kelps
E. Some giant marine forms

Which of the following is correct?
(a) A – II, B – II, C – I, D – III, E – IV
(b) A – I, B – II, C – III, D – IV, E – IV
(c) A – I, B – I, C – II, D – III, E – IV
(d) A – IV, B – IV, C – III, D – II, E – I

Question. In aquatic ecosystems, which one is of paramount importance as primary producers in chain?
(a) Algae
(b) Angiosperms
(c) Pistia
(d) Gellidium

Question. The members of class chlorophyceae are commonly called
(a) Red algae
(b) Blue-green alage
(c) Green algae
(d) Brown algae

Question. The major pigments in green algae are _____ and _____ and stored food is _____
(a) Chl a, Chl d, starch
(b) Chl a, Chl c, floridean starch
(c) Chla, Chl b, starch
(d) Chl a, Chl c, mannitol

Question. Pyrenoids are present in _____ in most of the green algae
(a) Mitochondria
(b) Chloroplast
(c) In cytosol
(d) In nucleus

Question. Number of pyrenoids in members of green algae
(a) Always 1
(b) Always 2
(c) One to many
(d) Always many

Question. In green algae
(a) Some members show vegetative reproduction by fragmentation
(b) Asexual reproduction by production of various spores
(c) Sexual reproduction may be isogamous, anisogamous, oogamous
(d) All

Question. Which of the following pigment is found in brown algae?
(a) Chl a, chl c
(b) Chl a, chl d
(c) Chl a, chl c, fucoxanthin
(d) Chl a, phycoerythin

Question. Laminarin and mannitol, reserve food in brown algae are
(a) Lipids
(b) Complex carbohydrates
(c) Proteins
(d) Lipoproteins

Question. Which of the following is not a feature of the brown algae?
(a) Multicellularity and large size
(b) Almost exclusively marine
(c) Attached form have holdfast
(d) Most common pigment is chl b

Question. In most of the brown algae asexual reproduction takes place by
(a) Auxospores
(b) Aplanospores
(c) Pear shaped, biflagellate zoospores
(d) Multiflagellate Zoospores

NCERT Exemplar Problems

Question. Fusion of two motile gametes which are dissimilar in size is termed as:
a. Oogamy
b. Isogamy
c. Anisogamy
d. Zoogamy

Question. A plant shows thallus level of organisation. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to:
a. Pteridophytes
b. Gymnosperms
c. Monocots
d. Bryophytes

Question. Plants of this group are diploid and well adapted to extreme conditions. They grow bearing sporophylls in compact structures called cones. The group in reference is:
a. Monocots
b. Dicots
c. Pteridophytes
d. Gymnosperms

Question. If the diploid number of a flowering plant is 36. What would be the chromosome number in its endosperm?
a. 36
b. 18
c. 54
d. 72

Question. The giant redwood tree (Sequoia sempervirens) is a /an:
a. Angiosperm
b. Free fern
c. Pteridophyte
d. Gymnosperm

Past Year Questions

Question. Cycas and Adiantum resemble each other in having:
a. Vessels
b. Seeds
c. Motile Sperms
d. Cambium

Question. Male and female gametophytes independent and free living in:
a. Castor
b. Pinus
c. Sphagnum
d. Mustard

Question. Which of the following is monoecious?
a. Marchantia
b. Cycas
c. Pinus
d. Date Palm

Question. Gnetum, a gymnosperm differs from Cycas and Pinus but shows affinities with angiosperms in the features:
a. Perianth an two integuments
b. Embryo development and apical meristem
c. Absence of resin dusts and leaf venation
d. Presence of vessel elements and absence of archegonia

Question. Match the items of column-I and II:

Column-I	Column-II
A. Peritrichous flagellation	1. Ginkgo
B. Living fossil	2. Macrocystis
C. Rhizophore	3. Escherichia coli
D. Smallest flowering plant	4. Selaginella
E. Largest perennial alga	5. Wolffia

a. A-3 B-1 C-4 D-5 E-2
b. A-2 B-1 C-3 D-4 E-5
c. A-4 B-3 C-2 D-5 E-1
d. A-1 B-4 C-5 D-3 E-2

Assertion & Reason Questions

Directions: These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
A. If both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
B. If both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion and Reason are False.

Question. Assertion: Mosses reduce the impact of falling rain and prevent soil erosion.
Reason: Mosses from dense mat on the soil.

Question. Assertion: Fruits are not formed in gymnosperm.
Reason: Seeds are shed at very early stage.

Question. Assertion: Lichen has two partners- a fungus and an alga.
Reason: The lichen thallus is essentially fungal in nature with algal cells embedded.

Question. Assertion: Early moss gametophyte is protonema stage.
Reason: Late Moss gametophyte is leafy stage.

Question. Assertion: Water is not required for fertilization process in ferns.
Reason: Malic acid of archegonial neck attracts atherozoids.

Question. Assertion: Stomata are found on the surface of leaves in gymnosperms.
Reason: In gymnosperms, cuticle of leaves is thin.

Question. Assertion: Angiosperms lack flagellated male gametes.
Reason: Sperms are not dependent on water for fertilisation.

Question. Assertion: Pyrenoids are utilised during starvation.
Reason: Pyrenoids are proteinaceous bodies.

Question. Assertion: Chlorella could serve as a potential source of food and energy.
Reason: When dried, Chlorella has 15% protein, 45% fat, 10% minerals and vitamins.

Question. Assertion: The life cycle of Funaria is called diplohaplontic.
Reason: In Funaria, there is alterations of haploid gametophytic and diploid sporophytic phases, one becoming parent of the other.