1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:

A
water is transported
B
food is transported
C
for both water and food transportation
D
osmosis is observed
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Read the following statements about the vascular bundles:

(a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.

(b) Conjoint closed vascular bundles do not possess cambium

(c) In open vascular bundles, cambium is present in between xylem and phloem

(d) The vascular bundles of dicotyledonous stem possess endarch protoxylem

(e) In monocotyledonous root, usually there are more than six xylem bundles present

Choose the correct answer from the options given below :

A
(a), (b) and (d) only
B
(b), (c), (d) and (e) only
C
(a), (b), (c) and (d) only
D
(a), (c), (d) and (e) only
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to :

(a) secretion of secondary metabolities and their deposition in the lumen of vessels.

(b) deposition of organic compounds like tannins and resins in the central layers of stem.

(c) deposition of suberin and aromatic substances in the outer layer of stem.

(d) deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem.

(e) presence of parenchyma cells, functionally active xylem elements and essential oils.

Choose the correct answer from the options given below :

A
(a) and (b) only
B
(c) and (d) only
C
(d) and (e) only
D
(b) and (d) only
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

what is the role of large bundle sheath cells found around the vascular bundles in C4 plants?

A
To provide the site for photorespiratory pathway
B
To increase the number of chloroplast for the operation of Calvin cycle
C
To enable the plant to tolerate high temperature
D
To protect the vascular tissue from high light intensity
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