Pharmacognosy II Week 9 Quiz

False

True

Fibrous root system

<p>Tap root system</p> Signup and view all the answers

<p>Flowering root</p> Signup and view all the answers

<p>Primary root = Develops vertically downwards and is the main root of the plant. Secondary root = Arises from the primary root. Adventitious root = Develops from the stem or other plant parts. Prop root = Provides support and stability to tall plants. Aerial root = Develops in the air and may be involved in anchoring or absorbing moisture.</p> Signup and view all the answers

<p>Young root, intermediate, and old root.</p> Signup and view all the answers

<p>Protecting the growing point of the root</p> Signup and view all the answers

<p>They are fundamentally a mean of propagation and storage.</p> Signup and view all the answers

<p>Leaf tuber</p> Signup and view all the answers

<p>Horizontally, Vertically, Obliquely</p> Signup and view all the answers

<p>Both A and B</p> Signup and view all the answers

<p>Stem tubers develop from swollen underground stems, while root tubers develop from swollen roots.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Color of the external layer</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>Root stock and Stem tuber</p> Signup and view all the answers

<p>While both serve storage functions, roots are typically devoid of scale leaves and axillary buds, lack the growing point protected by root-cap, and have different arrangements of vascular bundles and pith.</p> Signup and view all the answers

<p>Root stock, sometimes referred to as a 'root-stock', is a type of underground stem that serves as the base for a plant's growth, sometimes referred to as the base of the stem itself. A stem tuber is a swollen underground shoot of a stem that is formed for storage during propagation and is separate from the base of the plant.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>In the case of root branching, endogenous refers to the origin of the new branches forming within the tissues of the main root, inside the root structure.</p> Signup and view all the answers

<p>Sobole refers to a specific type of rhizome, a horizontal underground stem, which exhibits a long, slender structure and rapid growth with a dense, branched appearance.</p> Signup and view all the answers

<p>Adventitious roots are specialized roots that arise from a plant's stem or leaves. Their primary function is to provide additional anchoring and support for the plant, particularly in environments that lack a firm rooting medium or if the main root system is damaged.</p> Signup and view all the answers

<p>Stem tuber</p> Signup and view all the answers

<p>A corm is a shortened, swollen underground stem that often has brown, scale-like leaves attached, notably found at the base of the stem. It has an apical bud for producing new growth and axillary buds for lateral development.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Rootstocks, which are thickened, vertically growing rhizomes, play a vital role in plant cultivation. They serve as a foundation for grafting, where cuttings or scions of a desirable variety are joined to the rootstock. This practice combines the root system from the rootstock with the desired growth features of the scion, resulting in a hybrid plant with enhanced characteristics or disease resistance.</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>Rootstocks are thickened, vertical rhizomes with shortened internodes, they are a common element for grafting in the manipulation of desirable traits in plants.</p> Signup and view all the answers

<p>Gentian</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Bulbs serve as specialized underground stems used for storing food reserves, they also act as a means of plant propagation, enabling new plants to develop from the bulb.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>A type of bulb composed of layers of thick fleshy scales that are more or less separate.</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>A corm is a solid, upright, compact underground stem with small, scale leaves, while a bulb is primarily composed of fleshy scales that are more or less separate, forming a tunic or covering around the bud for propagation.</p> Signup and view all the answers

<p>A rhizome is a horizontal, underground stem that typically grows deeper underground, often with lateral branches, and is commonly used for propagation. A stolon, conversely, is a horizontal underground stem that usually grows near the surface, and is often seen as an extension of a stem, also used for propagation.</p> Signup and view all the answers

<p>A stem tuber develops from a swollen underground stem, while a root tuber develops from a swollen root. Stem tubers are primarily used for food storage and propagation, and they can have small scales and buds, while root tubers are not used for propagation and typically lack these structures.</p> Signup and view all the answers

<p>It is always formed from the root system.</p> Signup and view all the answers

<p>Stolons, as horizontal underground stems, are primarily used for propagation and spreading a plant. This is often achieved through the formation of new plants at points along the stolon.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Subterranean stems serve two key functions: vegetative propagation and food storage. They help plants spread and reproduce asexually, and they provide essential nutrients and resources for future growth.</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>Both B and C</p> Signup and view all the answers