The vascular bundle is said to be open if
A. It consists of both xylem and phloem
B. It consists of xylem and no phloem
C. Cambium is present
D. Cambium is absent
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Which among the following one lays eggs and does not produce young ones directly?
A. Echidna
B. Kangaroo
C. Porcupine
D. Whale
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The chief elements of conduction in gymnosperms and pteridophytes are
A. Companion cells
B. Tracheids
C. Vessels
D. Xylem parenchyma
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From which of following groups does the whale belongs?
A. Fishes
B. Mammals
C. Reptiles
D. Amphibians
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Where are the Eucalyptus trees found in abundance?
A. Mizo hills
B. Naga hills
C. Manipur hills
D. Nilgiri hills
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After bringing out of water fishes die because
A. They get excess quantity of oxygen
B. Their body temperature increases
C. They cannot breathe
D. They cannot move in water
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In Oomycetes, the antheridium when develops on a separate hyphae is described as
A. Perigynous
B. Amphigynous
C. Androgynous
D. Diclinous
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Redness in apple is due to
A. Anthocyanin
B. Lycopene
C. Carotene
D. Xanthophyll
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Fish generally breathe through
A. Skin
B. Nose
C. Gills
D. Fins
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Match
List-I with
List-II and select the correct answer:
List-I (Stomata types)
List-II (Cell arrangements)
a. Allium type
1. Guard cells are not surrounded by any recognisable subsidiary cells
b. Hordeum type
2. Guard cells are dumbell-shaped and are surrounded by two subsidiary cells
c. Rhoeo type
3. Guard cells are surrounded by two lateral and two terminal subsidiary cells
d. Commelina type
4. Guard cells are surrounded by four lateral and two terminal subsidiary cells
A. a-1, b-2, c-3, d-4
B. a-2, b-1, c-4, d-3
C. a-3, b-2, c-4, d-1
D. a-4, b-2, c-1, d-3
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According to Hutchinson's system, which of the following begins with the most primitive order magnoliales and ends in verbenales?
A. Lignosae
B. Herbaceae
C. Calyciferae
D. None of the above
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In Anthoceros, the gametophyte bears cavities which are often occupied by which of the following algae?
A. Oedogonium
B. Ulothrix
C. Nostoc
D. Vaucheria
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Aerating organs in the form of organised breaks also occur in the lower cortex of
A. Peltigera canina
B. Peltigera aphthosa
C. Siicta sylvatica
D. Parmelia sexuatilis
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Quinine which is a major drug for malaria is obtained from
A. Angiosperm
B. Bacteria
C. Yeast
D. Algae
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Which of the following is the product of fermentation of sugars and starches by Clostridium acetobutilicum?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
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The phellogen in the lenticel region is characterised by
A. The absence of intercellular spaces between its cells
B. The presence of photosynthetic pigments in its cells
C. The presence of intercellular spaces between its cells
D. The presence of intracellular spaces within its cells
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Who among the following for the first time ascertained the existence of sex and role of pollen grains in plants and mentioned them in De Sexu Plantarum Epistola?
A. Carolus Linnaeus
B. Camerarius
C. Caspar Bauhin
D. None of the above
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The double reduction in the number of chromosomes in the ascus is termed as
A. Amitosis
B. Incipient meiosis
C. Brachymeiosis
D. Pseudomeiosis
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The outer tangential wall of the epidermal cells is usually coated with waxy substance called
A. Cellulose
B. Chitin
C. Cutin
D. Xanthene
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In a group of RNA tumour viruses, called leukoviruses or rousviruses, the genetic material is
A. DNA only
B. RNA only
C. Alternately DNA and RNA
D. None of the above
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