31
Anomalous secondary growth in Boerhaavia shows
1
formation of extrastelar cambium
2
formation of interxylary cork
3
formation of interxylary phloem
4
formation of successive rings of cambia which develop either in the form of concentric rings or segments
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Answer: formation of successive rings of cambia which develop either in the form of concentric rings or segments
32
Which is correct for sapwood?
1
Tyloses are found in them
2
They are darker in colour
3
They are functional in conduction and storage
4
They produce timber of commerce
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Answer: They are functional in conduction and storage
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33
In dicotyledonous roots
1
pith is large and well-developed
2
secondary growth does not occur
3
number of vascular bundles varies from 2-6
4
number of vascular bundles more than 6 or 8
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Answer: number of vascular bundles varies from 2-6
34
Chlorella reproduces only asexually by the formation of
1
autospores
2
biflagellate zoospores
3
quadriflagellate zoospores
4
uniflagellate zoospores
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35
Chi tin is a
1
polysaccharide
2
nitrogenous polysaccharide
3
lipoprotein
4
protein
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Answer: nitrogenous polysaccharide
36
Volvox colonies are found in
1
freshwater ponds
2
salt lakes
3
seawater
4
spring
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37
The antibiotic produced by Chlorella is known as
1
chloromin
2
Chloromycetin
3
chlorellin
4
chloramphenicol
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38
Reticulate chloroplast with pyrenoids are present in
1
Oedogonium
2
Ulothrix
3
Batrachospermum
4
Chlorella
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39
Which of the following is a prokaryotic alga?
1
Polysiphonia
2
Cladophora
3
Anabaena
4
Ectocarpus
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40
An example of colonial coenocytic alga is
1
Spirogyra
2
Oedogonium
3
Hydrodictyon
4
Volvox
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41
Oogamous mode of reproduction is seen in
1
Ulothrix
2
Cladophora
3
Chlorella
4
Vaucheria
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42
Pyrenoids are
1
starch bodies surrounded by protein grains
2
starch bodies surrounded by oil droplets
3
protein bodies surrounded by oil droplets
4
protein bodies surrounded by starch plates
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Answer: protein bodies surrounded by starch plates
43
Reserve food floridean starch' is found in
1
Chlamydomonas
2
Polysiphonia
3
Chora
4
Vaucheria
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44
Polysiphonia exhibits a special kind of alternation of generations which is called
1
isomorphic
2
haplontic
3
diplontic
4
triphasic
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45
The cystocarp in Batrachospermum is
1
haploid
2
diploid
3
triploid
4
polyploid
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