Consider the following statements regarding the symptoms of wilt of arhar and choose the correct answer:
A. Only 2 and 3 are true
B. Only 2, 3 and 4 are true
C. Only 1 and 3 are true
D. 1, 2, 3 and 4 are true
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Auxanometers have been devised to measure
A. The increase in dry weight of a plant
B. The increase in volume of a plant
C. The increase in number of leaves of a plant
D. The increase in length of a plant
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In which of the following genera both micropylar and chalazal endosperm haustoria are found?
A. Nemophila
B. Balanophora
C. Nymphaea
D. Ricinus
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In India, typical halophytic vegetation is represented by
A. Deciduous forests
B. Evergreen forests
C. Tropical forests
D. Mangrove forests
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In a mature ovule the egg-apparatus is composed of
A. Two large eggs and a single synergid
B. Only a large egg
C. A large egg and three antipodal cells
D. A large egg and two synergids
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Consider the following statements and choose the correct answer:
A. Only 1, 2 and 3 are true
B. Only 2, 3 and 4 are true
C. Only 1, 3 and 4 are true
D. Only 1, 2 and 4 are true
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The vegetation with vertical gradient of gradually decreasing temperature from the surface is known as
A. Thermocline
B. Metalimnion
C. Hypolimnion
D. Epilimnion
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The adsorption of water by a confined imbibant develops
A. A pressure of less magnitude
B. A pressure of zero magnitude
C. A pressure of enormous magnitude
D. None of the above
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According to Melchers grafting experiments, which of the following plant parts responds initially to cold treatment?
A. Root tip
B. Stem apex
C. Flower bud
D. Primary root
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The first visual symptoms of red-rot of sugarcane appear
A. At the seedling stage
B. After the rain when plants stop growth and sugar formation begins
C. Before the rain when leaves dry up and star senescence
D. None of the above
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Perhaps the most characterstic arctic tundra plant is
A. Cladonia
B. Funaria
C. Anthoceros
D. Venda
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According to Raunkier, desert communities are dominated by
A. Phanerophytes and hemicryptophytes
B. Nanophanerophytes and chamaephytes
C. Threophytes and geophytes
D. Phanerophytes and chamaephytes
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Leaves of temperate deciduous woody trees may senesce and fall at a certain season of the year. Such a senescence of leaves or plant organs is called
A. Sequential senescence
B. Synchronous senescence
C. Shoot senescence
D. Monocarpic senescence
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In which of the following, the pollens of each anther lobe form a characteristic mass called pollinium?
A. Anona
B. Elodea
C. Typha
D. Calotropis
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There is evidence that bound gibberellins exist in plant tissues as
A. Gibberellin oxides
B. Gibberellin precursors
C. Gibberellin glycosides
D. Kaurene
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Chlorophyll 'a' directly takes part in photochemical reaction and hence it is termed as
A. Accessory pigment
B. Photosynthetic unit
C. Primary photosynthetic pigment
D. Secondary photosynthetic pigment
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Match
List-I (Pathologists) with
List-II (Statements) and select the correct answer:
List-I List-II
a. De Bary (1876)
1. The fungus Phytophthora infestans overwinters in the soil
b. Melhus (1915)
2. Confirmed De Bary's observations
c. De Bruyn (1926)
3. In temperate regions Phytophthora irfestans perennates in soil in the form of sporangia and germ tubes
d. Kaung (1956)
4. The mycelium of Phytophthora infestans overwinters in the infected tubers
A. a-1, b-2, c-4, d-3
B. a-3, b-4, c-2, d-1
C. a-4, b-2, c-1, d-3
D. a-4, b-3, c-2, d-1
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Match
List-I (Epiphyte types) with
List-II (Modes of life) and select the correct answer:
List-I List-II
a. Proto-epiphytes
1. Those that collect moist humus within large interwoven mass of roots
b. Hemi-epiphytes
2. Those whose leaves do the function of roots and absorb water and nutrient salts
c. Nest-epiphytes
3. Those that find their nutrients in the cortex of their support
d. Tank-epiphytes
4. Those that send their aerial roots into soil
A. a-1, b-2, c-3, d-4
B. a-3, b-2, c-4, d-1
C. a-2, b-3, c-1, d-4
D. a-3, b-4, c-1, d-2
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The principal function of photosystem I is the simultaneous generation of
A. A strong reductant and a strong oxidant
B. A weak reductant and a strong oxidant
C. A strong reductant and a weak oxidant
D. A weak reductant and a weak oxidant
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Match
List-I with
List-II and select the correct answer:
List-I (Reactions) List-II (Enzymes)
a. L-Alanine ⇄ D-Alanine
1. Cis-Trans Isomerase
b. Methyl Malonyl - CoA ⇄ Succinyl - CoA
2. Racemase
c. 3-phosphogly-ceraldehyde ⇄ Dihydroxyacetone-phosphate
3. Intramolecular Transferases
d. All-trans retinene ⇄ All-cis retinene
4. Intramolecular Ketol isomerases
A. a-1, b-3, c-2, d-4
B. a-2, b-4, c-3, d-1
C. a-2, b-3, c-4, d-1
D. a-1, b-3, c-4, d-2
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