NCERT Solutions Class 11 Biology Chapter 5 Morphology Of Flowering Plants
NCERT Solutions Class 11 Biology Chapter 5 Morphology Of Flowering Plants: National Council of Educational Research and Training Class 11 Biology Chapter 5 Solutions – Morphology Of Flowering Plants. NCERT Solutions Class 11 Biology Chapter 5 PDF Download.
NCERT Solutions Class 11 Biology Chapter 5: Overview
Board |
NCERT |
Class |
11 |
Subject |
Biology |
Chapter |
5 |
Chapter Name |
Morphology Of Flowering Plants |
Topic |
Exercise Solutions |
NCERT Solutions Class 11 Biology Chapter 5 – Morphology Of Flowering Plants
1.) What is meant by modification of roots? What type of modification of root is found in the:
(a) Banyan tree. (b) Turnip. (c) Mangrove trees.
Answer: The roots are modified in various plants and tress for various reasons such as function to the perform. The root modification can be in term of size, shape, and structure.
(a) Banyan tree: The roots of the banyan tree are called prop roots, modified for the purpose of hanging.
(b) Tornip roots: These kind of roots are generally swollen for the purpose of storage of foods.
(c) Mangrove trees: The roots of the mangrove trees are called as pneumatophores, they are modified for the purpose of oxygen.
2.) Justify the following statements on the basis of external features:
(i) Underground parts of a plat are not always roots.
(ii) Flower is a modified shoot.
Answer: (i) Underground parts of the plant are not always roots: Yes, The underground parts of the roots are not always roots, instead .They can be stem such as rhizome, tubers, and bulb etc.
Their function is the storage of food.
(ii) Flower is a modified shoot: Flower, is a modified shoot because, flower contain buds in many of the plants in addition to this flowers structure that in thallamus is similar with pedicel of stem.
Flower have sort of similarity with the structure of leaf.
3.) How is a pinnately compound leaf different from a palmately compound leaf ?
Answer: Pinnately compound leaf different from palmately compound leaf in terms of common axis, Pinnately compound leaf has characristics presence of mid rib. for example:Neem. In case of palmately compound leaf through the common point leaflet arises .For example: Silk cotton.
4.) Explain with suitable examples the different types of phyllotaxy.
Answer: Phyllotaxy can be defined as arrangements of leaves are a particular stem or branch of the plant. The phyllotaxy can be divided into three types such as.
(a) Alternate phyllotaxy: The leaves are arranged in alternate moriner at the node of the stem
Example: Sunflower.
(b) Opposite phyllotaxy: The pair of leaves are present in stem, which are arranged opposite to each other. Example: Guava plant.
(c) Whorled Phyllotaxy: The presence of one or more leaves at a single node called as Whorled .
Example: Aistersia.
5.) Define the following terms
(a) aestivation (b) placentation (c) actinomorphic.
(d) zygomorphic (e) superior ovary (f) perigynous flower (g) epipetaus stamen
Answer: (a) Aestivation: The arrangements of petals or repples on a flower differ from other membrous called as aestivation.
(b) Placentation: in the ovary, arrangement of ovule called as placentation. Placentation can be divided into marginal basal axile and parietal.
(c) Actinomorphic: actinomorphic can be defined as when flower can be cut into two equal parts from radial phone centre it is called as actinomorphic.
(d) Zygomorphic: zygomorphic can be defined as when flower cannot be cut into two equal parts from radial phone centre it is called as zygomorphic.
(e) Supervisor ovary: when ovary of the plant in superior position and other parts at the lowest position, in hypergamous flower it is said to be superior ovary.
(f) Perigynous flower: when gymnoecium is present at the centre and other part are at the thalamus , at same lead called as perigynous flower.
( g) Epipetalous stamen: Stamen to the Petal in a flower , called as epipetalous flower.
Example: Brinjal.
6.) Differentiate between:
(a) Racemose and cymose inflorescence.
(b) Fibrous root and adventitious root
(c) Apocarpous and syncarpous ovary.
Answer: (a) Racemose and cymose inflorescence.
Racemose inflorescence | Cymose inflorescence |
1.) Infinite number of flowers can be produce. | 1.) Finite flower |
2.) The flower can be acropetal | 2.) The flower is besipetal |
(b) Fibrous root and adventitious root
Fibrous root | Adventitious root |
1.) Arises from the base of the stem. | 1.) Arises from other parts of plant |
2.) Wheat plant | 2.) Banyan tree. |
(c) Apocarpous and syncarpous ovary.
Apocarpous | syncarpous ovary |
1.) If the carpels are not fused or free are called as apocarpous ovary | 1.) If the carpels are fused,they are called as syncarpous ovary. |
2.) Example: Ranucolus | 2.) Example: China rose. |
7.) Draw the labelled diagram of the following:
(a) Gram seed. (b) V.S of maize seed.
Answer: (a) Gram seed-
(b) V.S.of maize seed
8.) Describe modifications of stem with suitable examples.
Answer: the stem of the various plants are not suitable as per requirement therefore to perform a particular function stem modification is important.
(1) The stem can be underground such as potato, ginger and turmeric.
(2) The stem are also modified for storage of food.
(3) In plants such as cucumber and watermelon stem is modified as stem tendril as slender and spiral for the purpose of climbing.
(4) In citrus, thorns are presented for the purpose of protection.
In case you are missed :- Previous Chapter Solution
9.) Take one flower is of the families fabaceae and solanaceae and write itsAsemi- technical description. also draw their floral diagram after studying them.
Answer: family fabaceae- for example- Pisum sativum.
(b) Family – Solanaceae. Fir example- Solanum nigrum
Floral formula
10.) Describe the various types of placentation found in flowering plants.
Answer: In the ovary arrangement of ovules called as placentation.The placentation can be divided into various types such as basal , parital, marginal, axile and free Central.
1.) Basal placentation- Single ovule attached and placenta forms at the base of ovary.
For example- Sunflower.
2.) Parital placentation- Ovule are present at the inner part of the ovary for example mustard.
3.) Marginal placentation- Placenta present at the ridge of the ovary and ovule forms the two roots
Example pea.
4.) Axile- The ovary is multicellular and ovule are attached to it. example lemon.
5.) Free central- When septa is absent and ovule are present at centre called free Central example primrose.
11.) What is a flower ? Describe the parts of a typical angiosperm flower.
Answer: flower is made up of calyx, corolla ,sepals and petals.
1.) Calyx- outermost part of a flower called as sepals. The sepals nature is green and leaf like structure which helps to protect the bud.The calyx can be of two types such as gamosephalous. (Sepals fused) and polysepqlous ( free sepals) .
2.) Corolla- Corolla is made of petals and required factor for the purpose of pollination.Petal nature is bright coloured colar is of two types of gamopetalous (petals fuseed)and polypetalous (free petals) androecium and gynoecium are male and female reproductive parts respectively.
12.) How do the various leaf modification help plants?
Answer: leaf modifications are very useful for the plants. As for the purpose of photosynthesis leaf is the main part leaves can be modified to tendrills, for the purpose of climbing they can be converted to spines for defence or protection.
13) Define the term inflorence explain the basis for the different types inflorence in flowering plants.
Answer:
Inflorescence can be define as arrangements of flowers. This arrangement on the basis of either apex is converted to flower or grow as it is inflorence divided into two types
1.) Racemose inflorescence- It has ability to produce infinite number of flowers and the flower can be acropetal.
2.) Cymose inflorescence- It can be produce the finite number of flowers. The flower can be besipetal.
14.) Write the floral formula of actinomorphic, bisexual, hypogynous flower with five United sepals, five petals ,five free stamens and to United carpels with superior ovary and axile placentation.
Answer: Floral formula:
15.) Describe the arrangement of floral members in relation to their insertion on thalamus.
Answer: A flower is a specialised structure in anangiosperms.It is reproductive structure the parts of the flower are calyx, corolla, sepals and petals androecium and gynoecium the stalk on which flower is situated called as pedicel.
In case you are missed :- Next Chapter Solution