Multiple Choice QuestionsInterfascicular cambium develops from the cells of
medullary rays
xylem parenchyma
endodermis
endodermis
Lenticels are involved in
Transpiration
Gaseous exchange
Food transport
Food transport
Companion cells are closely associated with
sieve elements
vessel elements
trichomes
trichomes
Water containing cavities in vascular bundles are found in
sunflower
maize
Cycas
Cycas
B.
maize
In monocot stem like Zea mays, vascular bundles are conjoint, collateral and closed. In vascular bundles, the lowermost protoxylem vessels and xylem parenchyma cells dissolve forming a water containing schizolysigenous cavity called protoxylem cavity or lacuna or lysigenous cavity. Protoxylem cavity and protophloem may be absent in the smaller vascular bundles in maize.
To obtain virus - free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
Apical meristem only
Palisade parenchyma
Both apical and axillary meristems
Both apical and axillary meristems
As compared to a dicot root, a monocot root has
more abundant secondary xylem
many xylem bundles
inconspicuous annual rings
inconspicuous annual rings
You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structure will you use to distinguish between the two?
Secondary xylem
Secondary phloem
Protoxylem
Protoxylem
Vascular bundles in monocotyledons are considered closed because
a bundle sheath surrounds each bundle
cambium is absent
there are no vessels with perforations
there are no vessels with perforations
A major characteristic of the monocot root is the presence of
Open vascular bundles
Scattered vascular bundles
Vasculature without cambium
Vasculature without cambium
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