Download LSE-13-2002

ASSIGNMENT BOOKLET
Bachelor’s Degree Programme in Science
(B.Sc.)
PLANT DIVERSITY - II
ASSIGNMENTS 2002
ASSIGNMENT-1 TMA-1
ASSIGNMENT-2 TMA-2
ASSIGNMENT-3 CMA
SCHOOL OF SCIENCES
Indira Gandhi National Open University
Maidan Garhi
New Delhi – 110 068
LSE-13
LSE-13
Assignments 1, 2 &3
2002
Dear Students,
As explained in the Programme Guide, you will have to do 3 assignments for the Plant Diversity Course
LSE-13. Out of these two assignments are Tutor Marked (TMA) and the other is Computer Marked
(CMA). The blockwise distribution of assignments is as follows:
Assignment – 1 (TMA)
Assignment – 2 (TMA)
Assignment – 3 (CMA)
Block 1& 2
Block 3A, 3B & 4
Block 1 to 4
The instructions for doing the assignments are provided in the Programme Guide under Section 7.1
Assignment. You should read the instructions carefully before you start doing these assignments.
Please submit your assignments as follows:
Assignment No.
Assignment – 1 (TMA)
Assignment – 2 (TMA)
Assignment – 3 (CMA)
Date of Submission
8 weeks after receiving the printed
material with assignments.
12 weeks after receiving the printed
material with assignments.
12 weeks after receiving the printed
material with assignments.
Answer sheets received after the due date shall not be accepted.
We strongly suggest that you retain a copy of your assignments.
Wishing you all good luck.
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Where to Send
The Coordinator of your study centre
The Coordinator of your study centre
The Director (SR&E),
Indira Gandhi National Open
University,
Maidan Garhi,
New Delhi – 110068.
ASSIGNMENT – 1
(Tutor Marked Assignment)
Course Code : LSE-13
Assignment Code : LSE-13/AST-1/TMA-1/2002
Max. Marks : 100
1.
a)
b)
c)
Differentiate between gymnosperms and angiosperms.
Describe various types of life cycles found in gymnosperms.
Describe the economic importance of gymnosperms.
a)
b)
Prepare a list of the species of Cycas that occur in India.
Plot their distribution on a map of India.
a)
b)
c)
Why there has been a marked decline in the number of cycads all over the world? Cite the
reasons.
Discuss the measures taken to arrest their further decline.
In your opinion, what measures would ensure their abundance all over the world?
(5+2½+2½)
4.
a)
b)
Depict the life cycle of Pinus through diagram only.
Describe microsporangium, microsporogenesis and male gametophyte of Gnetum in detail. (4+6)
5.
a)
b)
Name two anatomical characters that you would choose to identify an Ephedra plant.
Write the anatomical details of the above two characters. Draw clear and labelled
illustrations to support your explanation.
Discuss the ecological significance of these two characters (as cited in a).
2.
3.
c)
(1+6+3)
(3+2)
(2)
(4+2)
(2)
6.
How does the pollination mechanism of Cycas differ from that of Ephedra? Discuss.
(10)
(The break-up of marks is as follows: Correct facts – 6 marks; clear and logical presentation of facts – 2 marks; and
use of relevant, and labelled illustrations for enhancing the clarity of the answer – 2 marks.)
7.
a)
b)
c)
Describe the internal structure of dicot leaf and differentiate it with monocot leaf.
Describe various modifications found in angiospermic leaves.
Describe the formation of abscission zone in leaf.
a)
b)
Describe the formation of floral organs or floral organogenesis in angiosperm.
Discuss the phylogeny of carpel.
a)
b)
Describe various theories put forward to explain shoot apical organisation.
Give only diagram of the following:
i)
T.S. Dicot stem, Monocot stem
ii) T.S. Dicot root, Monocot root
8.
9.
10. a)
(3+5+2)
(5+5)
(5+2½+2½)
b)
In most plants, the meristems are located at the tips of their shoots and roots, and cambia as
cylindrical layers within the stems and roots. What could happen if they (meristems/cambia)
were present in the leaves?
Discuss the application-oriented aspect of Pollination-Biology studies.
c)
(Suggestion: Strengthen your argument by including the applications of pollination biology in our lives)
Why is parenchyma considered a versatile tissue? Give reasons.
(5+5+5)
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ASSIGNMENT – 2
(Tutor Marked Assignment)
Course Code : LSE-13
Assignment Code : LSE-13/AST-2/TMA-2/2002
Max. Marks : 100
1.
a)
b)
Write a brief account of various types of cereals grown in India.
Define cereal. Which is the most important cereal in our country. Mention its cultivation and
economic uses.
(5+1+4)
2.
a)
b)
c)
What botanical sense does the term ‘legume’ make to you?
Are all legumes pulses?
Write your analysis of the title of Unit-12, that is, ‘Legumes (Pulses)’. Suggest an alternative
for it.
(2+1+2)
3.
Make a list of important fruits of India, along with their family, botanical names and plant part used
as fruit. Describe any two fruits in detail under the headings: Origin and distribution, ecology,
botany and uses.
(4+3+3)
4.
a)
b)
5.
Give reasons why leafy vegetables are important in human diet. How are blanched leafy
vegetables obtained?
(2+3)
List the plants in which fruits are used as vegetables. Describe any two vegetables under the
heading: Origin and distribution, ecology, botany and uses.
(5)
Discuss the crises being faced by the Indian Tea/Coffee industry in the global perspective.
(10)
(Guidelines: In addition to having a thorough understanding of the text material, some exploratory work would help
you develop an insight especially of the current scenario, as well as to prepare a meaningful account. Read the ‘Agribusiness’ or ‘Plant-commodities’ related columns in your local newspapers, or in the Economics-related newspapers
wherein often many facets of national and international issues concerning Tea/Coffee production and marketing are
discussed and analysed.)
6.
Why has the economic importance of edible oil-yielding plants considerably increased over the
years? Discuss, particularly in context of our country.
(5)
(Suggestion: Gather information about ‘Yellow Revolution’, in the same manner as for Q. No. 5)
7.
You are given an adulterated sample of ‘rice-flour’ for analysis. How would you go about
ascertaining its purity, and identifying the adulterants?
(5)
(Hint: In addition to mentioning the identifying features of the main product – rice flour, also include the
identifying features of the commonly used adulterants. Refer to the sources of starch that you have studied in
Unit 15.)
8.
Select two medicinal plants that are used in your home. These should be other than the ones
mentioned in the related unit of the course.
Write their: (i) common names, (ii) botanical name (can take the help of your Counsellor),
(iii) plant part used, (iv) one target disease/ailment, and (v) the methods of their use.
[(1x5)2]
9.
What are the various spices grown in India? Describe about some important spices obtained from
flower and flower buds?
(2+4+4)
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10. Find out the following details (i-viii) of a commonly used wood in your area. This wood should be
other than the ones mentioned in Unit-20.
i)
Common name(s)
ii) Botanical name
iii) Family
iv) Place of occurrence of the plant
v) Age of plant when its wood becomes marketable
vi) Uses of the wood (write atleast two uses)
vii) Characters/properties that make this wood suitable for the purpose
viii) Is this wood used as a substitute of some other wood?
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(1)
OR
Write five uses of a plant-fibre growing in or nearby your region. Avoid if you can, cloth as one of
the uses. Writing two lines about each use, and making illustrations would be appreciated.
(5+2½+2½)
[(Guidelines: The break-up of marks in like this: Writing five uses – 5 marks; Additional information pertaining to
the uses and the products – 2½ marks; Illustrations (can be of the products also) – 2½ marks)]
11. Select any two ornamental plants found near your house/park/college garden, and write about their
following details: (i) common name(s), (ii) botanical name, (iii) family, and (iv) the plant part of each
that gives them their ornamental value.
[(½+½+½+1)x2]
(Hint: In Bougainvillea, the petaloid bracts of the closely-grouped flowers, make it an attractive and much soughtafter ornamental plant.)
12. Describe the family Poaceae and Arecaceae with the reference to their morphological diversity and
give economic importance.
(5+5)
Dear Learners,
In case, you need some more clarification/guidance, you are welcome to contact anyone
of us using the following facilities.
1.
Dr. Amrita Nigam
Tel. No. (Office): 6857067 (From 10:30 a.m. to 4:00 p.m., on all working days)
E-mail: [email protected]
2.
Dr. Jaswant Sokhi
Tel. No. (Office): 6857067 (From 10:30 a.m. to 4:00 p.m., on all working days)
E-mail: [email protected]
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ASSIGNMENT – 3
(Computer Marked Assignment)
Course Code : LSE-13
Assignment Code : LSE-13/AST-3/CMA-1/2002
Max. Marks : 100
1.
The seed coat in Gymnosperms is a formed by
1) old sporophyte
2) new sporophyte
3) female gametophyte
4) male gametophyte
2.
Cycadales were prevalent during:
1) Porterozoic era
2) Cenozoic era
3) Paleozoic era
4) Mesozoic era
3.
Cycads are considered as transitional stages between ferns and gymnosperms because of which of the
following features?
1) Coralloid roots
2) Large male cone
3) Ciliate sperms
4) Boat-shaped pollen
4.
In Pinus megaspore mother cell develops into
1) seed
2) seed coats
3) four megaspores
4) embryo
5.
Which of the following is related to ‘tent-pole’?
Choose the correct answer from the choices (1-4) given below:
a) Ephedra
b) Cycas
c) Female gametophyte
d) Second sperm cell
e) Pollen chamber
f) Male cone
g) Meristems
h) Megasporophylls
Choices
1) b, d, f
2) c, g, h
3) d only
4) a, c, e
6.
One of the following is not a part of the pollination drop of Ephedra. Identify it.
1) Amino acids
2) Sugars
3) Lactic acid
4) Inorganic phosphates
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7.
The wood of Gnetum is remarkable because of the presence of
1) vessels
2) tracheids
3) xylem parenchyma
4) phloem
8.
In Gnetum mother cells or meiocytes by interconnecting themselves with broad cytoplasmic channels
forms
1) übisch granules
2) orbicules
3) syncytium
4) uninucleate microspores
9.
The most important kauri gum comes from
1) Taxus baccata
2) Thuja plicata
3) Picea abies
4) Agathis australis
10. Which one of the following is a complex tissue?
1) Epidermis
2) Meristems
3) Xylem
4) Parenchyma
11. ………………………. is the time between the initiation of one leaf and the next.
(Fill in the blank space picking a correct word from below)
1) Phyllotaxy
2) Plastomere
3) Phyllome
4) Plastochron
12. The root cap though characteristic of roots but degenerates in
1) parasitic plants
2) monocots plants
3) water plants
4) saprophytic plants
13. In which of the following plant inflorescence axis gets modified into tendril?
1) Prunus
2) Carissa
3) Aegle
4) Antigonon
14. In Amphicribral vascular bundles
1) phloem differentiates on either side of the xylem.
2) phloem differentiates outer side and xylem towards inner side of vascular cambium.
3) xylem surrounds phloem completely.
4) phloem surrounds xylem completely.
15. In which of the following family gynostegium is formed?
1) Asclepiadaceae
2) Musaceae
3) Liliaceae
4) Rutaceae
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16. The most primitive stamens considered among living angiosperms are found in
1) Austrobaileya
2) Degenaria
3) Magnolia
4) Daphniphyllum
17. Identify the ‘plant-pollinator’ pair that is not correctly matched.
1) Ficus carica
Bat
2) Oenothera biennis Bee
3) Caesalpinia spp.
Butterfly
4) Salvia pratensis
Bumblebee
18. In an unidentified red-coloured, long, tubular flower, the nectar is produced during the day time, and it
remains hidden deep in the flower. Which of the following would be an ideal pollinator for such a
flower?
1) Bee
2) Butterfly
3) Bat
4) Bird
19. The most common cultivated wheat Triticum spelta is
1) diploid
2) tetraploid
3) triploid
4) hexaploid
20. In male inflorescence of maize plant each floret has
1) lemma, palea, 2 fleshy lodicules
2) lemma, palea, 2 fleshy lodicules and one stamens
3) lemma, palea, 2 fleshy lodicules and three stamens
4) palea, 2 fleshy lodicules and three stamens
21. The ‘wonder bean’ plant has got this name because of which of the following features?
Choose the correct answer from the choices (1-4) given below.
i)
Popular vegetable
ii) Oldest known pulse
iii) Fruit develops underground
iv) Suitable for genetic studies
v) High protein content
vi) An animal feed
vii) Rich in edible oils
viii) Non-drying oil
Choices
1) ii only
2) v, vi, vii
3) i, iii, viii
4) iv, vii, viii
22. Tick () mark the plant correctly matched with its growing season.
1) Cicer arietinum Hot, humid climate
2) Pisum sativum
Cool, humid climate
3) Phaseolus mungo Heavy rainfall
4) Glycine max
Cold, dry climate
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23. Which one of the following characterises the groundnut oil?
1) Pale yellow liquid, does not form a solid film on exposure to air, contains sinigrin.
2) Golden yellow (cold-pressed), reddish yellow tinge (hot-pressed), with a faint agreeable odour.
3) White to yellowish in colour, solidifies at temperatures below 24C.
4) Yellow to dark amber-coloured, with a characteristic beany odour.
24. Rank the importance of following plants as the world sources of vegetable oils.
Their abbreviations are: Sunflower (Su), Soyabean (So), Groundnut (Gr), and Cottonseed (Co).
Tick () the correct ranking in the choices 1-4.
Rank 
1st
2nd
3rd
4th
1)
Su
So
Gr
Co
2)
Co
Su
So
Gr
3)
Gr
Co
Su
So
4)
So
Gr
Co
Su
 Choices
25. Identify the incorrect statement amongst the following.
1) Castor oil is used in pharmacy as a strong laxative.
2) A good example of drying oil is castor oil.
3) Castor oil is widely used because of its bactericidal action.
4) Castor cake-meal is widely used as a livestock feed.
26. Foods cooked in which of the following oils can be stored for a long time, without being rancid and
loosing their flavour, as well as the vitamins?
1) Coconut oil
2) Castor oil
3) Sesame oil
4) Linseed oil
27. In banana the fruit is botanically called
1) drupe
2) berry
3) syncarp
4) pepo
28. Prussic acid is found in
1) chest nut
2) bitter almond
3) pistachio
4) pear
29. The edible part of Ipomoea batatas is
1) tuber
2) tuberous root
3) small bulblets
4) stem
30. Which of the following is man made cereal?
1) Sorghum bicolour
2) Avena sativa
3) Triticale
4) Secale cereale
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31. In orange the edible part is
1) flavedo
2) albedo
3) mesocarp
4) endocarp
32. Which of the following pair is not correct?
1) Rye
Secale cereale
2) Ergot
Claviceps purpurea
3) Indian oat
Avena sativa
4) Great millet Sorghum bicolour
33. Identify the ‘noble’ cane among the following.
1) Saccharum officinarum
2) Saccharum barberi
3) Saccharum spontaneum
4) Saccharum sinense
34. Ratooning is associated with which of the following plant?
1) Sweet sorghum
2) Wild date palm
3) Sugarbeet
4) Sugarcane
35. If the vertically cut two halves of a potato are given to you, how would you confidently, and
accurately identify the apical half from the two pieces?
1) By locating the point of attachment.
2) Looking for more crowded distribution of ‘eyes’.
3) By observing the texture of the skin.
4) By selecting the more round-shaped half.
36. A reddish yellow pigment a glycoside-crocin is found in
1) clove
2) saffron
3) ginger
4) chillies
37. Dimorphic leaves are found in
1) coriander
2) mustard
3) cardamom
4) pepper
38. Which of the following is true nut in botanical sense?
1) Almond
2) Chestnut
3) Pistachio
4) Walnut
39. The best stage for harvesting the leaves of Digitalis for the purpose of drug-making is:
1) the first year
2) the fifth year
3) the juvenile stage
4) the senescence stage
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40. Which of the following indicates the correct match between the ‘essential-oil yielding plant’ (left
hand) and the ‘plant-part used for oil extraction’ (right hand)?
1) Cinnamon leaves
2) Vetiver
bark
3) Orange
leaves
4) Clove
flower bud
5) Nutmeg
fruit
41. The operations, in the order – withering, rolling, fermentation and drying would make which kind of
tea?
1) Black tea
2) Green tea
3) Oolong tea
4) Legg-cut tea
42. The average productive life of a coffee plant is:
1) 10 years
2) 25 years
3) 50 years
4) 65 years
43. Cooperage is the ………………………………….. .
(Fill in the blank space picking the correct choice from below)
1) technique for coating wooden plants with resins.
2) method of storing coffee seeds for sowing purposes.
3) method of tapping trees for latex.
4) art of making wood containers.
44. Which of the following family would be the best for looking for monadelphous stamens?
1) Brassicaceae
2) Malvaceae
3) Rutaceae
4) Fabaceae
45. In family Musaceae which of the given species has all the six stamen fertile and of equal size.
1) Musa
2) Heliconia
3) Lowia
4) Ravenala
46. Which of the following family is quite similar in its characters with Liliaceae?
1) Musaceae
2) Arecaceae
3) Amaryllidaceae
4) Marantaceae
47. Botanically Cyathium is a …………………….. .
(Complete this statement)
1) single, bisexual flower.
2) modified fruit.
3) specialised cymose inflorescence.
4) miniature plant.
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48. A gynobasic style is characteristic of the family:
1) Rubiaceae
2) Acanthaceae
3) Amaranthaceae
4) Lamiaceae
49. In wheat which of the plant part increases grain production per plant?
1) Leaves
2) Tillers
3) Adventitious roots
4) Ligule
50. Which of the following is a climber stem?
1) Ceroxylon
2) Calamus
3) Corypha
4) Raphia
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