Multiple Choice QuestionsWater containing cavities in vascular bundles are found in
sunflower
maize
Cycas
Cycas
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
C.
Both apical and axillary meristems
Both apical and axillary meristems are free of virus for the healthy plant cultivation because of strong interferon activity in this region. These tissue form a protective impermeable covering around themselves, which s non-penetrable by any pathogen. Hence, these tissue are used in the production of disease-free plants by tissue culture.
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
In land plants, the guard cells differ from other epidermal cells in having
mitochondria
endoplasmic reticulum
chloroplasts
chloroplasts
The cork cambium, cork and secondary cortex are collectively called
Phellogen
Periderm
phellem
phellem
Function of copanion cells is
providing energy to sleve elements for active transport
Providing water to phloem
loading of sucrose into sieve elements by passive transport
loading of sucrose into sieve elements by passive transport
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