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NCERT Solutions for Class 11 Biology Chapter 5 Morphology Of Flowering

by aglasem
August 25, 2021
in 11th Class
Reading Time: 1 min read
0
NCERT Solutions

NCERT Solutions Class 11 Biology Chapter 5 Morphology Of Flowering – Here are all the NCERT solutions for Class 11 Biology Chapter 5. This solution contains questions, answers, images, explanations of the complete chapter 5 titled Morphology Of Flowering of Biology taught in Class 11. If you are a student of Class 11 who is using NCERT Textbook to study Biology, then you must come across chapter 5 Morphology Of Flowering. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Biology Chapter 5 Morphology Of Flowering in one place.

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NCERT Solutions Class 11 Biology Chapter 5 Morphology Of Flowering

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Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Biology for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.

For a better understanding of this chapter, you should also see summary of Chapter 5 Morphology Of Flowering , Biology, Class 11.

Class 11
Subject Biology
Book Biology
Chapter Number 5
Chapter Name

Morphology Of Flowering

NCERT Solutions Class 11 Biology chapter 5 Morphology Of Flowering

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Class 11, Biology chapter 5, Morphology Of Flowering solutions are given below in PDF format. You can view them online or download PDF file for future use.

Morphology Of Flowering Download

NCERT Solutions for Class 11 Biology Chapter 5 Morphology of Flowering Plants Download

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Question & Answer

Q.1: What is meant by modification of root? What type of modification of root is found in the 
(a) Banyan tree 
(b) Turnip 
(c) Mangrove trees

Ans : Primarily, there are two types of root systems found in plants, namely the tap root system and fibrous root system. e main function of the roots is to absorb water and minerals from the soil. However, roots are also modified to perform various other functions. The roots of some plants act as storage sites for food, some provide support to massive plant structures, while others absorb oxygen from the atmosphere. Roots and its modifications in various plants: (a) Banyan tree : The banyan tree (Ficus benghalensis) has massive pillar-like adventitious roots arising from the aerial part of the stem. These roots grow towards the ground and provide support to the tree. Such roots are called prop roots. (b) Turnip : The roots of turnip (Brassica rape) help in the storage of food. Similar food-storing roots are found in radishes, carrots, and sweet potatoes. (c) Mangrove tree : The roots of mangrove plants grow vertically upwards from the soil for the absorption of oxygen from the atmosphere as the soil is poorly aerated. These types of roots are called pneumatophores.

Q.2: Justify the following statements on the basis of external features 
(i) Underground parts of a plant are not always roots 
(ii) Flower is a modified shoot

Ans : (i) Various parts of plants are modified into underground structures to perform various functions such as stems, leaves, and even fruits. The stems in ginger and banana are underground and swollen due to storage of food. They are called rhizomes. Similarly, corm is an underground stem in Colocasia and Zamin-khand. The tips of the underground stem in potato become swollen due to the accumulation of food and forms tuber. Tubers bear eyes, which are subtended by a leaf scar. Basal leaves in onions become fleshy because of the accumulation of food. In peanuts, the flower after fertilization gets pushed inside the soil by growing a flower stalk. The formation of fruits and seeds takes place inside the soil. (ii) During the flowering season, the apical meristem gives rise to the floral meristem. The axis of the stem gets condensed, while the internodes lie near each other. Instead of leaves, various floral appendages arise from the node. Therefore, it can be said that the flower is a modified shoot.

Q.3: Explain with suitable examples the different types of phyllotaxy?

Ans : Phyllotaxy refers to the pattern or arrangement of leaves on the stem or branch of a plant. It is of three types, alternate, opposite, and whorled phyllotaxy. In alternate phyllotaxy, a single leaf arises from the node of a branch. This type of phyllotaxy is observed in the sunflower, mustard, and peepal. Plants with opposite phyllotaxy have two leaves arising from the node in opposite directions. It is found in guava and jamun plants. Plants with whorled phyllotaxy have three or more leaves arising from the node. It is found in Alstonia.

Q.4: Define the following terms: 
(a) Aestivation 
(b) Placentation 
(c) Actinomorphic 
(d) Zygomorphic 
(e) Superior ovary 
(f) Perigynous flower 
(g) Epipetalous Stamen

Ans : (a) Aestivation : The term 'aestivation' refers to the mode in which sepals or petals are arranged in a floral bud with respect to other floral members. There are four types of aestivation in plants i.e., valvate, Wisted, imbricate, and vexillary. (b) Placentation : The term 'placentation' refers to the arrangement of ovules within the ovary of a flower. It is primarily of five types, namely marginal, basal, parietal, axile, and free central. (c) Actinomorphic : Actinomorphic flowers can be divided into two radial halves by any radial plane passing through its centre. Examples of these flowers include chilly and mustard. (d)Zygomorphic : Zygomorphic flowers are those flowers which can be divided into two similar halves by a single vertical plane. Examples of these flowers include pea and beans. (e) Superior ovary : Superior ovary flowers are those flowers in which the gynoecium is present at the highest position, while other floral parts are arranged below it. A flower with this arrangement is described as hypogynous. Examples include brinjal and mustard. (f) Perigynous flower : In perigynous flowers, the gynoecium is present in the centre and the rest of the floral parts are arranged at the rim of the thalamus at the same level. Examples include plum and rose. (g) Epipetalous Stamen : Epipetalous stamens are stamens attached to the petals. They are found in brinjal.

Q.5: Differentiate between 
(a) Racemose and cymose inflorescence 
(b) Fibrous roots and adventitious roots 
(c) Apocarpous and syncarpous ovary

Ans : (a) Racemose and cymose inflorescence (b) Fibrous roots and adventitious roots (c) Apocarpous and syncarpous ovary

NCERT / CBSE Book for Class 11 Biology

You can download the NCERT Book for Class 11 Biology in PDF format for free. Otherwise you can also buy it easily online.

  • Click here for NCERT Book for Class 11 Biology
  • Click here to buy NCERT Book for Class 11 Biology

All NCERT Solutions Class 11

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You can also check out NCERT Solutions of other classes here. Click on the class number below to go to relevant NCERT Solutions of Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

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