61
Which of the following does not have a pith?
1
Protostele
2
Solenostele
3
Siphonostele
4
Dictyostele
Answer & Explanation
63
Cycas ovule is
1
anatropous
2
orthotropous
3
hemianatropous
4
campylotropous
Answer & Explanation
64
Pinus differs from angiosperm in
1
tree habit
2
green leaves
3
presence of wood
4
ovules without an enclosing ovaiy
Answer & Explanation
Answer: ovules without an enclosing ovaiy
65
The female gametophyte of Gnetum is
1
monosporic
2
bisporic
3
trisporic
4
tetrasporic
Answer & Explanation
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
Answer & Explanation
67
Linnaeus' system of classification is
1
artificial system
2
natural system
3
phylogenetic system
4
synthetic system
Answer & Explanation
Answer: artificial system
68
Spikelets with glumes are found in
1
Cyperaceae
2
Poaceae
3
Arecaccae
4
Araceae
Answer & Explanation
70
The botanical name of sunflower is
1
Hetianthus annuus
2
Helianthus tuberosus
3
Tagetes patula
4
Tagetes erecta
Answer & Explanation
Answer: Hetianthus annuus
71
Osmotic pressure of a solution is usually measured in
1
kelvin
2
joule
3
pascal
4
newton
Answer & Explanation
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
Answer & Explanation
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
Answer & Explanation
75
Conduction of sap in plants occurs through
1
heartwood
2
bark
3
xylem
4
cortex
Answer & Explanation
