Text Book Back Questions and Answers - Chapter 2 Plant Kingdom 11th Biology Botany Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

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On April 24, 2024, 11:35 AM

Plant Kingdom
Text Book Back Questions and Answers
Choose the correct answer
Question 1.
Which of the plant group has gametophyte as a dominant phase?
(a) Pteridophytes
(b) Bryophytes
(c) Gymnosperm
(d) Angiosperm
Answer:
(b) Bryophytes
Question 2.
Which of following represent gametophytic generation in pteridophytes?
(a) Prothallus
(b) Thallus
(c) Cone
(d) Rhizophore
Answer:
(a) Prothallus
Question 3.
The haploid number of chromosome for an Angiosperm is 14 , the number of chromosome in its endosperm would be
(a) 7
(b) 14
(c) 42
(d) 28
Answer:
(c) 4
Question 4.
Endosperm in Gymnosperm is formed
(a) at the time of fertilization

(b) before fertilization
(c) after fertilization
(d) along with the development of embryo
Answer:
(b) before fertilization
Question 5.
Differentiate halpontic and diplontic life cycle.
Answer:
Halpontic cycle:
- Gametophyte is dominant
- Sporophyte is represented by zygote
Diplontic cycle:
- Sporophyte is dominant
- Gametophyte is represented by few cell gametophyte
Question 6.
What is Plectostele? Give example.
Answer:
Plectostele: Xylem plates alternates with phloem plates. Example: Lycopodiurn clavatum.
Question 7.
What do you infer from the term Pycnoxylic?
Answer:
Pycnoxylic wood is compact with narrow medullary ray. Example: Pinus
Question 8.
Mention two characters shared by Gymnosperms and Angiosperms.
Answer:
Gymnosperms:
- Vessels are absent (except Gnetales)
- Phloem lacks companion cells

Angiosperms:
- Vessels are present
- Companion cells are present
Question 9.
Do you think shape of chloroplast is unique for algae? Justify your answer.
Answer:
Variation among the shape of the chloroplast is found in members of algae. It is Cup shaped (chlamydomonas). Discoid ((Chara), Girdle shaped (Ulothrix), reticulate (Oedogonium), spiral (Spirogyra), stellate (Zygnema) and plate like (Mougeoutia).
Question 10.
Do you agree with the statement 'Bryophytes need water for fertilization'? Justify your answer.
Answer:
Yes, in Bryophytes. water plays a vital role in fertilisation, since water film is needed for the transfer of spermatium (male sex cell) to the egg cell.
Entrance Examination Questions Solved
Question 1.
Which of the following are found in extreme saline conditions?
(a) Archaebacteria
(b) Eubacteria
(c) Cyanobacteria
(d) Mycobacteria
Answer:
(a) Archaebacteria
Question 2.
Select the mismatch 
(a) Frankia Alnus
(b) Rhodospirillum
Mycorrhiza
(c) Anabaena vitrogen fixer
(d) Rhizobium Alfalfa

(b) Rhodospirillum - Mycorrhiza
Question 3.
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? 
(a) Bacillus
(b) Pseudomonas
(c) Mycoplasma
(d) Nostoc
Answer:
(c) Mycoplasma
Question 4.
Read the following statements (A to E) and select the option with all correct statements: 
A. Mosses and Lichens are the first organisms to colonise a bare rock.
B. Selaginella is a homosporous pteridophyte,
C. Coralloid roots in Cycas have VAM.
D. Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
E. In gymnosperms, male and female gametophytes arc present within sporangia located on sporophyte.
(a) B, C and $E$
(b) A, C and D
(c) B, C and D
(d) A, D and $E$
Answer:
(d) A, D and $E$
Question 5.
An example of colonial algae is 
(a) Chlorella
(b) Volvox

(c) Ulothrix
(d) Spirogyra
Answer:
(b) Volvox
Question 6.
Five kingdom system of classification suggested by RH. Whittaker is not based on 
(a) Presence or absence of a well defined nucleus
(b) Mode of reproduction
(c) Mode of nutrition
(d) Complexity of body organisation
Answer:
(a) Presence or absence of a well defined nucleus
Question 7.
Mycorrhizae are the example of 
(a) Fungitasis
(b) Amensalism
(c) Antibiosis
(d) Mutualism
Answer:
(d) Mutualism
Question 8.
Which of the following shows coiled RNA strand and capsomeres? 
(a) Polio virus
(b) Tobacco mosaic virus
(c) Measles virus
(d) Retrovirus
Answer:
(b) Tobacco mosaic virus
Question 9.
Viroids differ from viruses in having: 

(a) DNA molecules with protein coat
(b) DNA molecules without protein coat
(c) RNA molecules with protein coat
(d) RNA molecules without protein coat
Answer:
(d) RNA molecules without protein coat
Question 10.
Select the mismatch: 
(a) Pinus - Dioecious
(b) Cycas-Dioecious
(c) Salvinia - Heterosporous
(d) Equisetum - Homosporous
Answer:
(a) Pinus - Dioecious
Question 11.
Life cycle of Ectocarpus and Fucus respectively are 
(a) Haplontic, Diplontic
(b) Diplontic, Haplodiplontic
(c) Haplodiplontic, Diplontic
(d) Haplodiplontic, Halplontic
Answer:
(c) Haplodiplontic, Diplontic
Question 12.
Zygote meiosis Is characterisitic of 
(a) Marchantia
(b) Fucus
(c) Funaria
(d) Chlamydomonas
Answer:
(d) Chlamydomonas
Question 13.
Which of the following is correctly matched for the product produced by them? 
(a) Acetobacter aceti : Antibiotics
(b) Merthanobacterium : Lactic acid
(c) Penicilium natatum: Acetic acid
(d) Saccharomyces cerevisiae: Ethanol
Answer:
(d) Saccharomyces cerevisiae: Ethanol
Question 14.
Which of the following components provides sticky character to the bacterial cell? 
(a) Cell wall
(b) Nuclear membrane
(e) Plasma membrane
(d) Glycocalyx
Answer:
(d) Glycocalyx
Question 15.
Which of the following statements is wrong for viroids? 
(a) They lack a protein coat
(b) They are smaller than viruses
(c) They causes infections
(d) Their RNA is a high molecular weight
Answer:
(d) Their RNA Is a high molecular weight
Question 16.
In bryophytes and pteridophytes, transport of male gametes require 
(a) Wind
(b) Insects
(c) Birds
(d) Water
Answer:
(d) Water

Question 17.
How many organisms in the list below are autotrophs? 
Answer:
Lactobacillus, Nostoc, Chora, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia.
(a) Four
(b) Five
(c) Six
(d) Three
Answer:
(c) Six
Question 18.
Which of the following would appear as the pioneer organisms on bare rocks?
(a) Lichens
(b) Liverworts
(c) Mosses
(d) Green algae
Answer:
(a) Lichens
Question 19.
Monoecious plant of Chara shows occurrence of 
(a) Stamen and carpel on the same plant
(b) Upper antheridium and lower oogonium on the same plant
(c) Upper oogonium and lower antheridium on the same plant
(d) Antheridiophore and archegoniophore on the same plant
Answer:
(c) Upper oogonium and lower antheridium on the same plant
Question 20.
Read the following five statement $(A-E)$ and answer as asked next to them 
(a) In Equisetum, the female gametophyte is retained on the parent sporophyte

(b) In Ginkgo, male gametophyte is not independent
(c) The sporophyte in Riccia is more developed than that in Polytrichum
(d) Sexual reproduction in Volvox is isogamous
(e) The spores of slime moulds lack cell walls
How many of the above statement are correct? 
(a) Two
(b) Three
(c) Four
(d) One
Answer:
(d) One
Question 21.
One of the major components of cell wall of most fungi is 
(a) Chitin
(b) Peptidoglycan
(c) Cellulose
(d) Hemicellulose
Answer:
(a) Chitin
Question 22.
Which one of the following statements is wrong? 
(a) Cyanobacteria are also called blue - green algae
(b) Golden algae are also called desmids
(c) Eubacteria are also called false bacteria
(d) Phycomycetes are also called algal fungi
Answer:
(c) Eubacteria are also called false bacteria
Question 23.
Flagellated male gametes are present in all the three of which one of the following sets? 
(a) Riccia, Dryopteris and Cycas
(b) Anthoceros, Funaria and Spirogyra

(c) Zygnema, Saprolegnia and Hydrilla
(d) Fucus, Marsilea and Calotropis
Answer:
(a) Riccia, Dryopteris and Cycas
Question 24.
Ectophloic siphonostele is found in . 
(a) Adiantum and Cucurbitaceae
(b) Osmunda and Equisetum
(c) Marsilea and Botrychium
(d) Dicksonia and maiden hair fern
Answer:
(b) Osmunda and Equisetum
Question 25.
Which part of the tobacco plant is infected by Meloidogyne incognita? 
(a) Flower
(b) Leaf
(c) Stem
(d) Root
Answer:
(d) Root
Question 26.
Select the correct statement: 
(a) Gymnosperms are both homosporous and heterosporous
(b) Salvinia, Ginkgo and Pinus all are gymnosperms
(c) Sequoia is one of the tallest trees
(d) The leaves of gymnosperms are not well adapted to extremes of climate

Answer:
(c) Sequoia is one of the tallest trees
Question 27.
Seed formation without fertilization in flowering plants involves the process of . 

(a) Sporulation
(b) Budding
(c) Somatic hybridization
(d) Apomixis
Answer:
(d) Apomixis
Question 28.
Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom 
(a) Animalia
(b) Monera
(c) Protista
(d) Fungi
Answer:
(b) Monera
Question 29.
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the 
(a) Halophiles
(b) Thermoacidophiles
(c) Methanogens
(d) Eubacteria
Answer:
(c) Methanogens