2nd Grand Quiz on Plant Anatomy
The living tissue that provides support to the growing parts of the plant, is
Sclerenchyma
Collenchyma
Fibers
With reference to bark, which one of the following statements is false?
it is a tissue which is completely living.
Is a tissue external to innermost phellogen.
protects loss of water.
Ajor part of wood of old dicot stem is filled with tannins, resins and gums. This part is called
Heart wood
Hard wood
Sap wood
In the stelar evolution, the type of stele that is highly evolved is
Dictyostele
Atactostelea and b
A and b
The major function of sieve tubes in plants, is
translocation of water & minerals.
Food storage.
Translocation of organic solutes.
All
Both phloem sieve tubes and xylem vessels are derived from same kind of precursor cell, but at maturity they are very different. What feature is unique to phloem sieve tubes?
The cell membrane remains intact in a mature functioning cell.
The cell wall is rigid because of deposition of lignin.
The cell contributes to the mechanical support of the stem.
Pericycle of roots is the site of origin of
Lateral rootd
Meristem
Secondary meristem
Cell division typically occurs only in the meristematic regions of plants. In which region would cell division not occur?
cambium between wood & bark.
Soot apex
Expanding leaf
The living and non-lignified component of vascular bundles are
Wood parenchyma & phloem.
wood fibres & phloem.
Vessel & phloem.
Root hairs develop from the region of:
Root cap
Muturation
Elongation
The balloon shaped structures called tyloses
Originate in the lumen of vessels
Are extensions of xylem parenchyma cells into vessels
Are linked to the ascent of sap through xylem vessels
Cortex is the region found between
Pericycle and endodermis
Epidermis and stele
Endodermis and vascular bundle
Vascular bundles in monocotyledons are considered closed because
There are no vessels with perforations
Cambium is absent
Xylem is surrounded all around by phloem
A major characteristic of the monocot root is the presence of
Vasculature without cambium
Scattered vascular bundles
Cambium sandwiched between phloem and xylem along the radius
Interfascicular cambium develops from the cells of
Endodermis
Medullary rays
Percycle
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