Question 2 :
Assertion: &#160;Presence of pneumatophores (the respiratory roots) is a special adaptation of hydrophytes.<br/> Reason: &#160;Pneumatophores help to take up oxygen from the atmosphere and transports it into the main roots.

Question 5 :
Select the correct code. Primary root is$1$. Positively geotropic<br/>$2$. Positively hydrotropic<br/>$3$. Negatively geotropic<br/>$4$. Negatively hydrotropic.

Question 7 :
Brownish branches coming down from crown of Banyan tree and reaching the soil are

Question 8 :
In which of the following plant, one plant penetrate its root into the host plant?

Question 18 :
In which of the following plant roots are modified for the respiration?

Question 22 :
Which two of these vegetables correctly represent the homologous structures?<br>Potato, Tomato, Radish, Brinjal, Carrot, Bottle-ground

Question 31 :
Thick unbranched roots found in corms and rhizomes of some plants are

Question 34 :
Rema was in the biology lab. When observing a plant tissue under the microscope, she saw a small out-growth coming from the outermost layer. Which part did she identify?

Question 39 :
Identify the root which characterized by the swollen apex and tapered end.

Question 46 :
The aerial adventitious roots that arise from the nodes or internodes of weak stem plant is&#160;

Question 49 :
Transition of exarch bundles of root to endarch bundles of stem occurs in <br>

Question 50 :
Assertion : Secondary roots and shoots are plagiogeotropic.<br><br>Reason : Plagiogeotropic roots are those which develop at an angle of $45^{o}$ from the vertical axis.<br>

Question 51 :
The root cap is not used in absorption of water due to<br/>

Question 52 :
Epiphytes like <i>Vanda</i>, develop special layer of absorptive&#160;tissue velamen consisting of 4 or 5 layers of long polygonal&#160;cells. Velamen is formed by<br/>

Question 53 :
In one plant, adventitious roots are modified for storage and in the other plant a lateral branch with short internodes and each node bearing a rosette of leaves and a tuft of roots. They are

Question 60 :
Given are some difference between an underground stem and a root. Select the option that identifies the incorrect pair of differences.<br/><table class="wysiwyg-table"><tbody><tr><td></td><td><b>Underground stem</b></td><td><b>Root</b></td></tr><tr><td>(i)</td><td>It is differentiated into nodes and internodes</td><td>it is not differentiated in to nodes and internodes.</td></tr><tr><td>(ii)</td><td>Scale leaves are present at the nodes.</td><td>Scale leaves are absent in&#160;roots.</td></tr><tr><td>(iii)</td><td>Axillary buds are present in the axil of scale leaves.</td><td>Axillary buds are present at root tips.</td></tr><tr><td>(iv)</td><td>Branches arise exogenously.</td><td>Branches arise endogenously.</td></tr><tr><td>(v)</td><td>Flowers and fruits absent<br/></td><td>Flowers and fruits&#160;are absent.</td></tr><tr><td>(vi)</td><td>These usually perform the function of food storage.</td><td>These usually perform the function of food storage.</td></tr></tbody></table>

Question 68 :
The stem of maize and sugarcane have support roots coming out of the lower nodes of the stem. They are called

Question 75 :
Some plants have rhizome and roots as underground structures. Which of the following characteristics of rhizome would distinguish them from roots?<br/>

Question 76 :
Match the items in Column I with Column II and choose the correct alternative.<br/><br/><table class="wysiwyg-table"><tbody><tr><td>Column I<br/></td><td>Column II<br/></td></tr><tr><td>A. Tubercular storage&#160;roots &#160;&#160;<br/></td><td>1. <i>Tinospora</i><br/></td></tr><tr><td>B. Pneumatophores<br/></td><td>2. <i>Heritiera</i><br/></td></tr><tr><td>C. Haustoria<br/></td><td>3. <i>Asparagus</i><br/></td></tr><tr><td>D. Prop-roots<br/></td><td>4. <i>Viscum</i><br/></td></tr><tr><td>E&#160; Assimilatory roots<br/></td><td>5. <i>Screwpine</i></td></tr></tbody></table>

Question 80 :
Assertion: In floating aquatic plants, root caps are absent. Reason: Root pockets are present in aquatic plants.

Question 85 :
The layer of cells outside the phloem meant for giving rise to&#160;the root branches is called as<br/>

Question 89 :
A condition found in roots of a plant having assimilatory submerged roots and spongy petioles

Question 105 :
Match the following lists.<br/><table class="wysiwyg-table"><tbody><tr><td><br/></td><td>List - I</td><td></td><td>List II</td></tr><tr><td>A)</td><td>Alstonia</td><td>I)</td><td>Roots at lower nodes of the stem</td></tr><tr><td>B)</td><td>Ananus sativus</td><td>II)</td><td>Leaflets are attached at a common point in the leaf</td></tr><tr><td>C)</td><td>Sugarcane</td><td>III)</td><td>Swollen placenta</td></tr><tr><td>D)</td><td>Bombax ceiba</td><td>IV)</td><td>More than two leaves at every node</td></tr><tr><td></td><td></td><td>V)</td><td>Underground lateral branches producing aerial leafy shoots</td></tr></tbody></table>

Question 106 :
Assertion: Clowes reported quiscent centre in <i>Zea mays</i> root, region behind rootcap. Reason: M&#233;rist&#232;me&#160;d'attente&#160;is region similar to this in shoot apex as its cells also have slow DNA replication.

Question 114 :
In a longitudinal section of a root, starting from the tip to upward, the four zones occur in which of the following order?