Chapter 6

Select the incorrect statement from the following: (a) End walls of sieve tube have sieve plates. (b) Sieve tube and companion cells are connected by pit present between common longitudinal wall. (c) Companion cells are specialized parenchymatous cells having nucleus which controls the function of sieve tubes (d) Phloem parenchyma is present in most of the monocots.

The following are live components of phloem except (a) Sieve tube (b) Companion cell (c) Phloem parenchyma (d) Phloem fibre (bast fibre) The following are dead components of xylem except

The following are dead components of xylem except (a) Tracheids (b) Vessels (c) Xylem sclerenchyma (wood fibres) (d) Xylem parenchyma

Select the correct statement from the following: (a) Companion cells help in maintaining pressure gradients in the sieve tubes. (b) Phloem parenchyma stores food material. (c) Bast fibres are generally absent in the primary phloem but are found in secondary phloem. (d) All of these

Following are the features of phloem fibres except (a) Pointed apices (b) More elongated (c) Branched (d) Unbranched

Phloem fibre, which is commercially used is actually (a) Jute (b) Flax (c) Hemp (d) All of these

Select the incorrect matching: (a) Protophloem Narrow sieve tubes (b) Metaphloem Bigger sieve tubes (c) Gymnosperm Albuminous cells and sieve cells (d) Gymnosperm Vessels in xylem

A mature sieve tube differs from vessel in (a) Being nearly dead (b) Lacking cytoplasm (c) Lacking a functional nucleus (d) Absence of lignified walls

In pteridophyta and gymnosperms, which cells are present in place of companion cell? (a) Sclereids (b) Albuminous cells (c) Idioblasts (d) None of these

Both vessels and companion cells are absent in (a) Angiosperms (b) Pteridophyta (c) Gymnosperms (d) Both (b) and (c)

The only plant cells without nuclei among the following are (a) Cambium cells (b) Cells of pericycle (c) Xylem parenchyma (d) Sieve tubes

Vessels differ from tracheids (a) In being derived from single cell (b) In having vertical rows of cells with cross walls dissolved (c) In being alive (d) In helping in the conduction of water

Companion cells are usually seen associated with (a) Fibres (b) Vessels (c) Tracheids (d) Sieve tubes

Sieve tubes are better suited for translocation because they (a) Possess broader lumen and perforated cross walls (b) Are broader than long (c) Possess bordered pits (d) Possess no end walls

Lignified cell wall is the characteristic feature of (a) Phloem cells (b) Epidermal cells (c) Cambial cells (d) Xylem cells

The chief function of sieve tube is (a) To translocate the organic materials manufactured in the leaves (b) To conduct minerals (c) To transport water from root to leaves (d) To help the plant in forming wood

The function of storage is performed by (a) Parenchyma (b) Sclerenchyma (c) Phloem (d) All of these

Which is present in the vascular bundles of gymnosperms? (a) Tracheids (b) Vessels (c) Companion cells (d) All of these

How many types of tissue systems are present in plant depending on their structure and function? (a) 1 (b) 2 (c) 3 (d) 4 ssue Susten

Tissue system include (a) Epidermal tissue system (b) Ground tissue system or fundamental tissue system (c) Vascular tissue system (d) All the above

Epidermal tissue system is made up of (a) Epidermal cells (b) Stomata (c) Epidermal appendages (d) All of these

Which of the following is epidermal appendage? (a) Trichome (b) Guard cell (c) Sclereid (d) Subsidiary cell

Select \(\mathrm{T} / \mathrm{F}\) (True/False). (a) Epidermis is usually single-layered. (b) Epidermal cells are parenchymatous cell with abundant cytoplasm. (c) Vessel members of xylem are interconnected through perforation in their common walls. (d) Sclerenchyma provides mechanical support to organs. (a) TTTT (b) TFFT (c) TFTT (d) FFTT

The epidermis is generally covered with a waxy thick layer called the which prevents the loss of water. (a) Suberin (b) Tunicin (c) Cuticle (d) Chitin

Which of the following is true about stomata? (a) Formed by guard cells (b) Regulate the process of transpiration and gaseous exchange (c) Mainly present on epidermis of leaves (d) All of these

Which of the following is true about guard cells? (a) Outer wall is thin (b) Inner wall (towards stomatal pore) is thick (c) Bean-shaped in dicots and dumb-bell-shaped in grasses (d) All of these

Which of the following cell posses chloroplast? (a) Mesophyll cells of leaf (b) Guard cells (c) Sometimes in cells of collenhcyma (d) All of these

Stomatal apparatus consists of (a) Subsidiary cells (b) Guard cells (c) Stomatal aperture (d) All of these

Stem hairs are (a) Unicellular (b) Acellular (c) Multicellular (d) Any of them

Trichomes are (a) Epidermal hair of stem (b) Either soft or stiff (c) Branched or unbranched (d) All of these

Select the incorrect statement from the following: (a) Trichomes help in preventing water loss due to transpiration (b) Cuticle prevents loss of water (c) Cuticle is absent in roots (d) Epidermis is made up of elongated, loosely arranged cell, which forms continuous layer

Ground tissue is made up of (a) Parenchyma (b) Collenchyma (c) Sclerenchyma (d) All of these

Parenchymatous cells are usually present in (a) Cortex, pericycle (b) Pith and medullary rays (c) Primary stem and roots (d) All of these

Vascular system consists of (a) Simple tissue (b) Complex tissue (c) Xylem (d) Phloem

Closed vascular bundle is present in (a) Monocot (b) Dicot (c) Both (a) and (b) (d) None of these

Conjoint vascular bundle is present in (a) Monocot stem (b) Dicot stem (c) Leaf (d) All of these

A root hair is formed by (a) Epidermal cell (b) Endodermal cell (c) Cortical cell (d) Pericycle cell

Epidermal outgrowths are known as (a) Stomata (b) Leaves (c) Trichomes (d) Flower buds

Vascular bundles having xylem and phloem which lie at the same radius is termed as (a) Concentric (b) Radial (c) Collateral (d) Amphicribral

Which of the following would not secrete a cuticle? (a) Root epidermis (b) Leaf epidermis (c) Xerophytes (d) Stem epidermis

Which one of the following is a type of tissue system? (a) Parenchyma (b) Sclerenchyma (c) Vascular (d) All of these

Root hairs are (a) Acellular (b) Unicellular (c) Multicellular (d) Multicellular and unicellular

Vascular bundles of roots are (a) Conjoint (b) Concentric (c) Bicollateral (d) Radial

Radial vascular bundle can be seen in (a) Leaf (b) Dicot root (c) Stem (d) Flower

When xylem and phloem are separated by a strip of cambium it is called (a) Collateral and open (b) Collateral and closed (c) Bicollateral and open (d) Concentric and closed

Vascular bundle is closed when (a) Cambium is present (b) Cambium is absent c) Pericycle is absent (d) None of these

I. Cortex is made up of several layers of thin-walled parenchyma cells with intercellular spaces. II. Endoderm is made up of single layer of barrel-shaped cells without any intercellular spaces. III. Few layers of thick-walled parenchymatous cell forms pericycle. IV. Pith is small or inconspicuous. V. Conjuctive tissue present is 2 to 4 xylem and phloem patches. (a) Dicot root (b) Dicot stem (c) Monocot root (d) Monocot stem

Stele is made up of (in dicot root) (a) Pericycle (b) Vascular bundle (c) Pith (d) All of these

Outside to inside the layer of monocot root are (a) Endodermis - Epidermis - Cortex - Pith-Vascular bundle-Pericycle (b) Pith-Epidermis-Endodermis-Cortex-Pericycle-Vascular bundle (c) Epidermis-Cortex-Endodermis-Pericycle-Vascular bundle-Pith (d) Pericycle-Vascular bundle-Cortex-Pith-Epidermis-Endodermis

The following features belong to which option? I. Epidermis may bear trachoma and few stomata. II. Cortex is divided into three sub-zones. III. Hypodermis is made up of collenchymas starch sheath. IV. Pericycle above phloem is in the form of semilunar patches of sclerenchyma. (a) Dicot root (b) Dicot stem (c) Monocot root (d) Monocot stem