Download Question Bank Kingdom Plantae

Question Bank
Kingdom Plantae
1. What is meant by thallus?
Ans. The plant body which is not differentiated into root, stem and
leaves, is known as thallus.
2. Draw a well labelled diagram of a unicellular and a
multicellular green alga.
Ans.
3. Name one unicellular green alga.
Ans. Chlamydomonas.
4. Name the branch of botany which deals with the study of
algae.
Ans. Phycology.
5. Why do bryophytes live in damp/moist shady places?
Ans. Bryophytes live in damp/moist shady places because they
require water to complete their life-cycle.
6. Give one word for the following :
(i) The simplest land plants which lack vascular tissues.
(ii) First land plants with vascular tissues.
(iii) Naked-seeded plants.
(iv) Vascular tissue-bearing plants.
(v) Plants having a single cotyledon in their seeds.
Biology Class-IX
1
Question Bank
Ans. (i) Thallophytes
(ii) Pteridophytes
(iii) Gymnosperms
(iv) Tracheophytes
(v) Monocotyledons
7. Distinguish between the following :
(a) Bryophyta and Pteridophyta
(b) Gymnosperms and Angiosperms
Ans. (a)
Bryophyta
(i) The plant body is not differentiated
into root, stem and leaves.
(ii) Vascular tissues are absent
(iii) Sex organs are simple and singlecelled.
(iv) After fertilisation, no embryo
formation takes place.
Pteridophyta
(i) The plant body is differentiated
Into root, stem and leaves.
(ii) Vascular tissues are present.
(iii) Sex organs are multicellular.
(iv) Embryo is formed after
fertilisation.
(b)
Gymnosperms
(i) Gymnosperms are naked
seeded plants.
(iii) The plants are tall trees or
shrubs.
Angiosperms
(i) These are seed-bearing plants and
the seeds are enclosed inside the
fruits.
(ii) Flowers are unique to the
Angiosperms and the
development of flowers is
associated with pollination.
(iii) The plants are tall trees as well As
small herbs.
Biology Class-IX
2
(ii) The flowers are represented by
unisexual cones.
Question Bank
8. You are given a number of different plants. How would you
identify a particular plant as
(a) an alga, (b) a moss and (c) a fern.
Ans. On the basis of important characteristics, we can identify the
given particular plants.
(a) Algae
1. Algae are green thallophytes that contain chlorophyll. In
some algae, other colours may mask the green colour, but
chlorophyll is present in all of them.
2. Algae are autotrophic plants they can manufacture their
own food with the help of chlorophyll.
3. They are aquatic in nature i.e., they are found in water
and moist places.
4. Cell wall is mainly of cellulose.
5. Reserve food material is usually starch.
6. Structurally, algae may be single-celled, multicellular
colonial, multicellular filamentous or thalloid.
(b) Moss
1. The plant body is either thallus-like (thalloid) or leaf-like
(foliose).
2. True roots are lacking; the plants are anchored to the soil
by means of filamentous rhizoids.
3. The vascular tissues are absent; plants, therefore, remain
short in stature.
4. The plant body is green and autotrophic.
5. Sex organs are multicellular.
6. After fertilization, embryo formation takes place.
7. Water is required for fertilization. Plants are, therefore,
restricted to moist and shady places.
Biology Class-IX
3
Question Bank
(c) Fern
1. These are green autotrophic plants.
2. The dominant plant body is differentiated into root, stem
and leaves.
3. Vascular tissues are present.
4. Sex organs are multicellular.
5. Embryo is formed after fertilization.
9. Name two plants each belonging to the following groups of
plants :
(a) Algae, (b) Bryophytes, (c) Pteridophytes, and
(d) Gymnosperms.
Ans. (a) Algae : Chlamydomonas and Spirogyra.
(b) Bryophytes : Marchantia and Funaria.
(c) Pteridophytes : Equisetum and Dryopteris.
(d) Gymnosperms : Cycas and Cedrus.
10. Name the groups of plants with following characters :
(a) Plants with seeds.
(b) Plants with seeds not enclosed in fruits.
(c) Plants having seeds with two cotyledons.
Ans. (a) Spermatophytes or Phanerogams
(b) Gymnosperms
(c) Dicotyledons.
11. Read the following statements and mark them True (T) or
False (F).
(i) Flowering plants were kept under Cryptogamae.
(ii) Thallus represents an undifferentiated plant body.
(iii) Chlamydomonas is a single–celled alga.
(iv) Liverworts are placed under pteridophytes.
(v) Ferns are saprophytic plants.
(vi) Ferns are a group of pteridophytes.
(vii) Both gymnosperms and angiosperms are seed-bearing
plants.
(viii)Pine is a common plant kept under gymnospermae.
Biology Class-IX
4
Question Bank
(ix) In dicotyledons, leaves are dorsiventral.
(x) Algae and fungi together make up the plants called
lichens.
Ans. (i) F, (ii) T, (iii) T, (iv) F, (v) F, (vi) T, (vii) T, (viii) T, (ix) T,
(x) T.
12. Label the parts 1 to 6 of the given
picture of Dryopteris (Fern).
Ans. (1) Roots, (2) Rachis, (3) Young leaf,
(4) Mature leaf, (5) Rachis, (6) Leaflets.
Dryopteris
Biology Class-IX
5
Question Bank