Match the root systems with their characteristic examples:
Column I (Root System)
Column II (Representative Example)
(a) Tap root system
(i) Monstera
(b) Fibrous root system
(ii) Mustard plant
(c) Adventitious root system
(iii) Wheat plant
Tap root system is found in dicotyledonous plants like the mustard plant. Fibrous root system is seen in monocots like the wheat plant, where the short-lived primary root is replaced by many roots from the stem base. Adventitious roots develop from parts of the plant other than the radicle, such as in grass, Monstera, and the banyan tree.
Question 202 of 300
📘 CLASS XI
Match the regions of the root-tip with their cellular characteristics:
Column I (Root Zone)
Column II (Cellular Features)
(a) Meristematic zone
(i) Cells undergo rapid elongation and enlargement, responsible for length
(b) Elongation zone
(ii) Cells are small, thin-walled, with dense protoplasm and divide repeatedly
(c) Maturation zone
(iii) Cells gradually differentiate and mature into specialized tissues
The meristematic zone contains small, thin-walled cells with dense protoplasm that divide repeatedly. The elongation zone, located proximal to the meristematic zone, is responsible for the root's growth in length. The maturation zone is where cells differentiate and mature.
Question 203 of 300
📘 CLASS XI
Match the physiological and mechanical functions of the root system with their definitions:
Column I (Root Function)
Column II (Definition / Role)
(a) Absorption
(i) Synthesis of chemical messengers that control growth and development
(b) Anchorage
(ii) Intake of water and minerals from the soil by root hairs
(c) PGR Synthesis
(iii) Providing structural stability and securing the plant parts to the soil
Water and mineral absorption is mediated by fine, delicate root hairs in the maturation zone. Anchorage refers to physically securing plant parts in the soil. Roots are also a major site for the synthesis of plant growth regulators (PGRs).
Question 204 of 300
📘 CLASS XI
Match the developmental and structural features distinguishing stems from roots:
Column I (Organ Feature)
Column II (Structural Context)
(a) Stem Origin
(i) Develops from the radicle of the embryo
(b) Root Origin
(ii) Bears nodes and internodes, develops from the plumule
(c) Stem Appendages
(iii) Multicellular hairs, branches, leaves, flowers, and fruits
The stem develops from the plumule of the germinating seed, bearing nodes and internodes. The primary root develops from the direct elongation of the radicle. Stems can be distinguished from roots by the presence of multicellular hairs, buds, leaves, and reproductive structures.
Question 205 of 300
📘 CLASS XI
Match the leaf base structural modifications with the plant groups:
Column I (Leaf Base Modification)
Column II (Plant Group / Description)
(a) Sheathing leaf base
(i) Small, lateral, leaf-like structures borne at the leaf base
(b) Pulvinus
(ii) Expands to cover the stem partially or wholly in monocotyledons
(c) Stipules
(iii) Swollen leaf base characteristic of some leguminous plants
In monocotyledons, the leaf base expands into a sheath covering the stem partially or wholly. In some leguminous plants, the leaf base becomes swollen and is called the pulvinus. Stipules are two lateral small leaf-like structures that may be present at the leaf base.
Question 206 of 300
📘 CLASS XI
Match the leaf parts with their physiological or mechanical roles:
Column I (Leaf Part)
Column II (Primary Function / Adaptation)
(a) Lamina
(i) Long, thin, and flexible; allows leaves to flutter in wind for cooling
(b) Petiole
(ii) Green expanded part of the leaf; primary site of photosynthesis
(c) Veins
(iii) Provide rigidity to the leaf blade and act as transport channels
The lamina is the expanded green blade with veins, which performs photosynthesis. The petiole holds the blade to light, and long flexible petioles allow fluttering in wind to cool the leaf and bring fresh air to its surface. Veins provide structural rigidity and act as transport channels for water, minerals, and food.
Question 207 of 300
📘 CLASS XI
Match the venation types with their representative plant groups:
Column I (Venation Type)
Column II (Typical Occurrence / Pattern)
(a) Reticulate venation
(i) Veins run parallel to each other within the lamina
(b) Parallel venation
(ii) Veinlets form a highly branched network
(c) Dicotyledons
(iii) Characteristic pattern is predominantly reticulate venation
(d) Monocots
(iv) Characteristic pattern is predominantly parallel venation
Reticulate venation occurs when veinlets form a network, which is typical of dicotyledonous plants. Parallel venation occurs when veins run parallel within the lamina, which is characteristic of most monocotyledons.
Question 208 of 300
📘 CLASS XI
Match the vegetative leaf classifications with their defining criteria:
Column I (Leaf Type)
Column II (Anatomical / Positional Criteria)
(a) Simple leaf
(i) Lamina is entire, or if incised, incisions do not reach the midrib
(b) Compound leaf
(ii) Incisions of the lamina reach up to the midrib, breaking it into leaflets
(c) Axillary bud
(iii) Present in the axil of petiole of both simple and compound leaves
(d) Leaflet axil
(iv) Bud is characteristically absent in this position
A leaf is simple if the lamina is entire or has incisions that do not touch the midrib. It is compound if incisions reach the midrib and break it into leaflets. A bud is found in the axil of the petiole in both simple and compound leaves, but never in the axils of leaflets.
Question 209 of 300
📘 CLASS XI
Match the compound leaf types with their diagnostic examples:
Column I (Compound Leaf Type)
Column II (Structural Feature / Example)
(a) Pinnately compound
(i) Leaflets are attached at a common point, at the tip of the petiole
(b) Palmately compound
(ii) Number of leaflets are present on a common axis called the rachis
(c) Neem
(iii) Classic representative example of pinnately compound leaf
(d) Silk cotton
(iv) Classic representative example of palmately compound leaf
In a pinnately compound leaf, leaflets are on a common axis, the rachis (representing the midrib), as seen in neem. In palmately compound leaves, leaflets are attached at a single point at the tip of the petiole, as seen in silk cotton.
Question 210 of 300
📘 CLASS XI
Match the phyllotaxy patterns with their basic geometric definitions:
Column I (Phyllotaxy Type)
Column II (Leaf Arrangement at Nodes)
(a) Alternate phyllotaxy
(i) A pair of leaves arise at each node and lie opposite to each other
(b) Opposite phyllotaxy
(ii) A single leaf arises at each node in an alternate manner
(c) Whorled phyllotaxy
(iii) More than two leaves arise at a node and form a circle/whorl
Phyllotaxy is the pattern of leaf arrangement on a stem. Alternate: a single leaf arises at each node alternately. Opposite: a pair of leaves arise opposite to each other at each node. Whorled: more than two leaves arise at a single node forming a whorl.
