XI Botany

NOTE: Answer any three questions. All questions carry equal marks. Attempt all the parts of a question together in sequence. Draw neat and labelled diagrams where necassary.

Question No. 1 (A)

Fill in the blanks with the correct answers. (03)
i. Mitochondria is known as the power house of the cell.
ii. In bacteria Iocomotary organs are called fagells.
iii. The word ‘VIRUS’ is derived from the latin word which means poison.
iv. Retovirus causes many disease such as yellow fever, measles, AIDS etc.
v. Late blight potato is caused by phytophthora intestant.
vi. In Basidiomycetes reproductive organs are called basidium.

Question No. 1 (B)

i. What is the technique of isolating the components of a cell? (02)
ii. Give the salient features of cynobacteria. (02)

Question No. 1 (C)

What is heterotrphic nutrition? Give various types of heterotrophs according to the mode of nutrition. (06)

Question No. 2 (A)

Write true of false for the following statements. (03)
i. Microscope is an instrument to observe very small objects. TRUE
ii. The cell wall is the controlling part of a cell. FALSE
iii. Bacteria were discovered by Leeuwenhoek in A.D. 1676. TRUE
iv. Bryophytes are vascular plants. FALSE
v. Gymnosperms are open – seeded plants. TRUE
vi. Fern prothallus is not a heart = shaped structure. FALSE

Question No. 2 (B)

1. Write a short note on any One of the following (02)

• Source Sink Movement
• Advantage and Disadvantage of Transpiration
• Plasmolysis and Deplasmolysis

2. Draw a neat and labelled diagrammatic life cycle of Ulva. (02)

Question No. 2 (C)

Define Respiration. Describe the aerobic degradation of pyruvic acid. (06)
OR
Define photosynthesis. Describe the mechanism of a light reaction in photosynthesis.

Question No. 3 (A)

Choose the correct answer for each from the given option.
i. Alternate mechanism of carbon dioxide fixation during a dark reaction occurs in

• C3 plants
• C4 plants
• C2 plants
• None of them

ii. Chlorophyll in the chloroplast is located in.

• Grana
• Stroma
• Ribosome
• Pyrenoid

iii. Cold diseases are caused by

• Rhinovirus
• Thabdovirus
• Bacteria
• Retrovirus

iv. The multinucleate unseptate mycelium is called

• Lichen
• Coenocytic
• Columella
• Nostoc

v. The non-vascular plants are called

• Angiosperm
• Gymnosperm
• Bryophyta
• None of them

vi. The nutrition in which energy is used by the oxidation of inorganic substances is called

• Phototropic
• Chemotrphic
• Heterotrophic
• Parasite

Question No. 3 (B)

1. Write a short note on any One of the following: (02)

• Lichen
• Slime mold
• Importance of Bacteria

2. Draw a neat and labelled diagram of L.S of Selaginella strobilus. (02)

Question No. 4 (A)

Write True or False for the following statements.
i. Hepatitis is a heart disease. FALSE
ii. Cell membrane is a respiratory organ in bacteria. TRUE
iii. Ulva shows isomorphic alternation of generations. TRUE
iv. Rhynia is a Bryophyta. FALSE
v. Phloem helps in translocation of food. TRUE
vi. Vexillary aestivation is present in the family Fabaceae. TRUE

Question No. 4 (B)

i. Describe the Cell Theory. (02)
ii. Define the role of A.T.P as energy currency. (02)

Question No. 4 (C)

Write short notes on any Three of the following. (06)
i. Evolution of Leaf
ii. Nucleus
iii. Plastid
iv. Mitochondria
v. Ribosome

Question No. 5 (A)

Match the items of Column A with those of Column B (03)

Column A
a. Tobacco
b. Touch-ME-Not
c. Maize
d. Bryophyta
e. Psilopsida
f. Pteridophyta

Column B
i. Mimosoideae
ii. Poaceae
iii. Solanceae
iv. Psilotum
v. Marchantia
vi. Fern

Answers
(iii)
(i)
(ii)
(v)
(iv)
(vi)

Question No. 5 (B)

1. Distinguish between any Two of the following: (02)
Light Microscope and Electron Micro
Prokaryote and Eukaryote
Cell Wall and Cell membrane
2. Describe the structure of Angiospermic ovule or T.S of Marchantia thallus. (02)

Question No. 5 (C)

Describe only the floral character, floral formula and floral diagram with economic importance of the family Rosaceae of Mimosaceae. (06)