61
Which of the following does not have a pith?
1
Protostele
2
Solenostele
3
Siphonostele
4
Dictyostele
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62
Coralloid roots occur in
1
Cycas
2
Pinus
3
Gnetum
4
Ephedra
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63
Cycas ovule is
1
anatropous
2
orthotropous
3
hemianatropous
4
campylotropous
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64
Pinus differs from angiosperm in
1
tree habit
2
green leaves
3
presence of wood
4
ovules without an enclosing ovaiy
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Answer: ovules without an enclosing ovaiy
65
The female gametophyte of Gnetum is
1
monosporic
2
bisporic
3
trisporic
4
tetrasporic
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66
The fossil organisms which show characters of two different groups of animals are called
1
transitional forms
2
missing links
3
transitory organisms
4
past links
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67
Linnaeus' system of classification is
1
artificial system
2
natural system
3
phylogenetic system
4
synthetic system
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Answer: artificial system
68
Spikelets with glumes are found in
1
Cyperaceae
2
Poaceae
3
Arecaccae
4
Araceae
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69
Allium cepa belongs to
1
Musaceae
2
Arecaceae
3
Brassicaceae
4
Liliaceae
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70
The botanical name of sunflower is
1
Hetianthus annuus
2
Helianthus tuberosus
3
Tagetes patula
4
Tagetes erecta
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Answer: Hetianthus annuus
71
Osmotic pressure of a solution is usually measured in
1
kelvin
2
joule
3
pascal
4
newton
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72
Root pressure is developed in
1
xylem
2
phloem
3
cortex
4
pith
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73
Which one of the following theories for ascent of sap was proposed by Sir J. C. Bose?
1
Pulsation theory
2
Root pressure theory
3
Relay pump theory
4
Transpiration pull theory
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74
When the plant cells are fully turgid, the turgor pressure is equal and opposite to the
1
diffusion pressure deficit
2
osmotic pressure
3
wall pressure
4
diffusion pressure
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75
Conduction of sap in plants occurs through
1
heartwood
2
bark
3
xylem
4
cortex
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