Important Questions Class 11 Biology Chapter 5 Morphology of Flowering Plants for CBSE

Important Questions for Class 11 Biology 5th Chapter Morphology of Flowering Plants MCQ, Very Short, Short Type, Long Type

CBSE Class 11 Important Questions for Class 11 Biology Chapter 5 Morphology of Flowering Plants all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 5.

  • MCQs

Q.1) Assertion: The hilum is a scar which is formed on the seed coat.

Reason: Above the hilum is a small pore called the micropyle.

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

Q.2) Assertion: Tap root of carrot is swollen.
Reason: the roots are used for food storage.

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

Q.3) In racemosetype of inflorescences the flowers are borne

a.) terminally

b.) laterally

c.) basipetal order

d.) centrally

Q.4) Plum, rose, peach are examples of_____ flowers

a.) hypogynous

b.)perigynous

c.) epigynous

d.) hypoandrus

Q.5) What is orientation of the leaves in alternate type of phyllotaxy?

a.)  more than two leavesarise at a node

b.) whorl of leaves can be seen

c.) a pair of leaves arise at each node

d.) a single leaf arises at each node

Q.6) In Australian acacia the leavesare modified into

a.) spines

b.) tendrils

c.) swollen leaf petiole for food storage

d.) pitcher

Q.7) Assertion: In a flower thegynoecium occupies the highest position while the other parts are situatedbelow it.

Reason: The ovary in such flowers is said to be inferior

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

Q.8) Assertion:Axillarybuds of roots may also get modified into woody, straight andpointed thorns

Reason: They contain chlorophyll and carry out photosynthesis.

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

Q.9) What is aestivation?

a.) The mode of arrangement of sepals/petals w.r.t other members

b.) The mode of arrangement of leavesw.r.t other members

c.) The mode of arrangement of androeciumw.r.t other members

d.) The mode of arrangement of gymnospermsw.r.t other members

Q.10) diadelphous stamens may be seen in

a.) Peas

b.) China rose

c.) Citrus

d.) Mustard

  • Answer in one sentence

Q.1) How are primary and secondary roots formed?

Ans. The formation of a primary root, which grows inside the soil, is caused by the direct elongation of the radicle. It has lateral roots of several types, known to as secondary, tertiary, and so on which grow on the primary roots.

Q.2) What is parthenocarpy?

Ans. Parthenocarpy refers to fruit that develops without the ovary being fertilized.

Q.3) What are Pneumatophores?

Ans. Pneumatophores are roots that aid in the uptake of oxygen for respiration. Many roots emerge from the ground and grow vertically upwards in some plants, such as Rhizophora in swampy environments.

Q.4) What are bisexual and unisexual flowers?

Ans. A flower is bisexual if it has both androecium and gynoecium. Unisexual flowers are those that have only stamens or carpels.

Q.5) What are the two layers of the seed coat?

Ans. The seed coat is a seed’s outermost coating. The outer testa and the inner tegmen are the two layers of the seed coat.

Q.6) What basic symbols are used in flower formula?

Ans. In the floral formula the following symbols are used: Br stands for bracteate, K stands for calyx, C for corolla, P for perianth, A for androecium and G for Gynoecium.

Q.7) In a typical flower which whorls form the accessory whorls and reproductive whorls respectively?

Ans. The four whorls of flower are divided into two categories: accessory whorls and reproductive whorls. Calyx and corolla are accessory whorls, while androecium and gynoecium are reproductive whorls.

Q.8) give the important functions of stem?

Ans. The stem’s primary job is to spread out branches carrying leaves, flowers, and fruits. Water, minerals, and photosynthates are all carried by the stem. Some stems have functions like food storage, support, protection, and vegetative propagation.

  • Answer in short

Q.1) Explain the functions of roots in plants?

Ans. 1.) Absorption of water and nutrients from the soil is the main function of the roots

2.) Apart from this appropriate anchorage of plant parts, storage of reserve food material, and synthesis of plant growth regulators are the essential functions of the root system.

Q.2) Differentiate between tap root, fibrous root and adventitious root types on plants.

Ans.

Tap roots Fibrous roots Adventitious roots
The tap root system is made up of the primary roots and lateral branches. The primary root of monocotyledonous plants is short-lived and is replaced by a vast number of roots. The fibrous root system is made up of roots that grow from the base of the stem. Adventitious roots are roots that emerge from regions of the plant other than the radicle.
Example: mustard

plant

Example: wheat plant Example: grass, Monstera and the banyan tree

Q.3) What is the difference between epipetalous and epiphyllous stamen?

Ans. 1.) Flower stamens can be joined to other components of the flower, such as petals, or to each other.

2.) When stamens are attached to the petals, as in brinjal, they are called epipetalous stamen.

3.) When the stamens attached to the perianth, as in lily flowers, they are known as epiphyllous stamen.

Q.4) What is drupe? Explain with examples.

Ans. 1.) The fruit is known as a drupe in mango and coconut.

2.) Drupe are one seeded and develop from monocarpellary superior ovaries.

3.) An exterior thin epicarp, a middle fleshy edible mesocarp, and an inner stony hard endocarp distinguish the mango pericarp. The mesocarp of coconut, which is also a drupe, is fibrous.

Q.5) Distinguish between simple and compound leaves

Ans. 1.) When a leaf’s lamina is complete or when the incisions do not touch the midrib, it is considered to be simple.

2.) The leaf is considered compound when the incisions of the lamina go up to the midrib, breaking it into a number of leaflets.

3.) In both simple and compound leaves, a bud can be found in the axil of the petiole, but not in the axil of the leaflets.

Q.6) Write the floral formula of a zygomorphic, bisexualflower with fourfree sepals, five united petals, two united stamens and three united carpel with superior ovary.

Ans. The floral formula is as follows: % K4C(5) A(2)G(3)

  • Answer in brief

Q.1) Briefly explain the regions in the root

Ans. 1.) root cap: it is a thimble-like structure that covers the tip and shields the root’s tip as it travels through the soil.

2.) Region of Meristematic activity: it occurs a few millimeters above the root cap. Rapidly dividing cells which are small, thin-walled, and have dense protoplasm.

2.) Region of elongation: The cells in this region experience rapid elongation and expansion, and they are responsible for the root’s lengthening.

3.) Region of maturation: The area proximal to the region of elongation, is known as the maturation zone. Some epidermal cells in this area develop root hairs, which are incredibly tiny and delicate thread-like structures. The soil’s water and minerals are absorbed by these root hairs.

Q.2) Describe the parts of a leaf.

Ans. 1.) The leaf base, petiole, and lamina are the three main parts of a normal leaf.

2.) The leaf base connects the leaf to the stem, and the leaf may have two lateral stipules, which are little leaf-like structures.

3.) The petiole aids in keeping the blade lit. Leaf blades float in the breeze, cooling the leaf and bringing fresh air to the surface, thanks to long thin flexible petioles.

4.) The leaf blade, or lamina, is the extended green section of the leaf with veins and veinlets. The midrib is a prominent vein that runs across the middle of the lamina. Veins give the leaf blade structure and serve as channels for water, minerals, and food components.

5.) Distinct leaves have different lamina shapes, margins, apexes, surfaces, and extents of incision.

Q.3) Define the following terms used to describe the parts of flower.

1.) Gamosepalous: If the sepals are connected, the calyx is said to be gamosepalous;

2.) Polysepalous: If the sepals are free, the calyx is said to be polysepalous.

3.) Gamopetalous: If petals are united the petals are said to be gamopetalous.

4.) Polypetalous: The flower is polypetalous if the petals are free.

5.) Staminode: Staminode is term used to describe sterile stamen.

6.) Apocarpous: When there are several carpels present in free and are referred to as apocarpous.

7.) Syncarpous: When carpels in flower is fused, the carpelis called syncarpous.

Updated: December 10, 2021 — 6:20 pm

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