Meristems, Vascular Systems and Secondary Growth - Plant Anatomy - Life Sciences Previous Year Questions

1

2007 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2007

Meristems escape virus invasion because

A

vascular system is absent in the meristem

B

of low metabolic activity in the meristem

C

the ‘virus inactivating system’ has low activity in the meristem

D

of low endogenous auxin level

Open complete paper

2

2007 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2007

Identify the correct statements.
P   Bundle sheath containing chloroplast present in C₄ plants
Q   Annual rings differentiate into barks and woods
R   Sap wood is important for biological functions and heart wood is economically important as it contains gums, resins, oils, tannins, etc.
S   Clonal propagation leads to somaclonal variation

A

P, Q

B

Q, R

C

R, S

D

P, R

Open complete paper

3

2010 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2010

A sign is hammered into a tree trunk 2 meters above the tree’s base. If the tree is 10 meters tall and elongates 1 meter each year, how high will the sign be after 10 years?

A

12 meters

B

7 meters

C

4 meters

D

2 meters

Open complete paper

4

2013 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2013

Which two of the following are the INCORRECT statements?
P. In monocotyledonous stems with closed vascular bundle, secondary growth takes place without any cambium
Q. In dicotyledonous stems hypodermis is collenchymatous
R. Mobilization of storage reserves takes place during post-germination of embryo
S. Osborne’s classification of seed storage proteins is based upon solubility in n-hexane

A

P, R

B

Q, S

C

Q, R

D

P, S

Open complete paper

5

2016 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2016

Which of the following does NOT use xylem to transport water?

A

Miscanthus

B

Marchantia

C

Selaginella

D

Magnolia

Open complete paper

6

2020 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2020

In natural condition, which of the following plants DOES NOT exhibit anomalous secondary growth?

A

Rice

B

Aloe

C

Yucca

D

Dracaena

Open complete paper

7

2020 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2020

In a typical angiosperm under natural condition, primary meristems are usually established during

A

Gametogenesis

B

Embryogenesis

C

Vegetative phase development

D

Secondary growth

Open complete paper

8

2023 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2023

Periderm is a protective tissue found in stems and roots of gymnosperm and woody dicotyledons. It contributes to the increased thickness by secondary growth. Match the peridermal components given in Group I with the cell/tissue types given in Group II.

A

P-4; Q-3; R-1; S-2

B

P-3; Q-2; R-4; S-1

C

P-2; Q-1; R-3; S-4

D

P-4; Q-1; R-3; S-2

Open complete paper

9

2023 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2023

Central vascular cylinder or stele consists of the primary vascular system (xylem and phloem) and the associate fundamental tissue. Match the schematics of stele in Group I (xylem shown in green, and phloem shown as \( oxed{} \)) with their respective types in Group II.

Group I	Group II
(P) [image of stele P]	(1) Protostele
(Q) [image of stele Q]	(2) Eustele
(R) [image of stele R]	(3) Atactostele
(S) [image of stele S]	(4) Ectophloic siphonostele
	(5) Amphiphloic siphonostele

A

P-2; Q-4; R-1; S-3

B

P-5; Q-1; R-4; S-2

C

P-5; Q-3; R-1; S-2

D

P-3; Q-4; R-2; S-5

Open complete paper

10

2026 · Life Sciences · Plant Anatomy · Meristems, Vascular Systems and Secondary Growth

Life Sciences (XL) 2026

Which one of the following plant organs typically exhibits all the four features listed below? (i) Starch-enriched endodermis (ii) Conjoint, collateral and open vascular bundle (iii) Endarch xylem (iv) Presence of medullary rays

A

Dicot root

B

Monocot root

C

Dicot leaf

D

Dicot stem

Open complete paper