Test Preparation on Anatomy of plants – II Biology Test Series for NEET - 2020

Bicollateral conjoint vascular bundles have

1Xylem and phloem, which are arranged in an alternate manner on different radii
2Xylem and phloem, which are situated at the same radius and it has two groups of phloem along the two sides of xylem (inside and outside)
3Xylem and phloem in same radius but it has only one group phloem outside the xylem
4Phloem surrounds the xylem tissues

In dicot roots, cells of which region show casparian strips

1Pericycle of the root
2Endodermis of the root
3Pericycle of the stem
4Endodermis of the stem

(b) Endodermis is mostly single layered and is made up of
parenchymatous barrel shaped compactly arranged
cells. The inner and radial or transverse wall of
enedodermal cells have casparian strips of suberin.

In monocot leaf

1Bulliform cells are absent from the epidermis
2Veins form a network
3Mesophyll is well differentiated into these parts
4Mesophyll is not differentiated into palisade and spongy parenchyma

(d) In between upper and lower epidermis, there is present
mesophyll tissue which is undifferentiated into palisade
and spongy parenchyma, but all the cells are alike.

Find out the wrong statement about angiosperm roots

1Cuticle is absent in young stages
2The apex is protected by root cap
3Vascular bundles are collateral
4Xylem is centripetal in growth in the young roots

A major characteristic of the monocot root is the presence of

1Scattered vascular bundles
2Vasculature without cambium
3Cambium sandwiched between phloem and xylem along the radius
4Open vascular bundles

(b) In monocot root, Cambium is absent in the vasculature.

In a vertical section of a dorsiventral leaf, the protoxylem in
its midrid bundle

1Faces the dorsal epidermis of the leaf
2Faces the ventral epidermis of the leaf
3Is not distinct
4Is surrounded by metaxylem

The annular and spirally thickened conducting elements
generally develop in the protoxylem when the root or stem
is

1Maturing
2Elongating
3Widening
4Differentiating

In barley stem vascular bundles are

1Open and scattered
2Closed and scattered
3Open and in a ring
4Closed and radial

Anatomically fairly old dicotyledonous root is distinguished
from the dicotyledonous stem by

1Absence of secondary xylem
2Absence of secondary phloem
3Presence of cortex
4Position of protoxylem

(d) In stems, the protoxylem lies towards the centre (pith)
and the metaxylem lies towards the periphery of the
organ. This type of primary xylem is called endarch. In
root, the protoxylem lies towards periphery and
metaxylem lies towards the centre, such arrangement is
called exarch.


Right Ans	Wrong Ans	Not Attempted