Important Questions Class 11 Biology Chapter 6 Anatomy of Flowering Plants for CBSE

Important Questions for Class 11 Biology 6th Chapter Anatomy of Flowering Plants MCQ, Very Short, Short Type, Long Type

CBSE Class 11 Important Questions for Class 11 Biology Chapter 6 Anatomy 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 6.

  • MCQS

(1) Gymnosperms lack vessels in their ___________.

(a) Xylem

(b) Phloem parenchyma

(c) Both xylem and phloem

(d) Sieve cells

(2) Autumn wood has ____

(a) light color

(b) high density

(c) active cambium.

(d) higher number of xylary elements

(3) Assertion: Sclerenchyma is the supporting tissue in plants composed of cellulose, hemicellulose and lignin.

Reason: Sclerenchyma provides the main structural support to a plant.

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 forAssertion.

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

d.) if both assertion and reason are false.

(4) Primary meristem is composed of

(a) Apical meristems and intercalary meristem

(b) Fascicular vascular cambium and intercalary meristem

(c) Interfascicular cambium and cork-cambium

(d) Apical meristems and cork-cambium

(5) Assertion: During the formation of leaves and elongation of stem, some cells ‘left behind’ from shoot apical meristem, constitute the lateral bud.

Reason: Such buds are present in the internode of stem and are capable of forming a flower

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.

(6) Fascicular vascular cambium, interfascicular cambium and cork-cambium are examples of

(a) Apical meristem

(b) Intercalary meristem

(c) Primary meristem

(d) Lateral meristem

(7) Vascular bundles in which cambium is present and possess the ability to form secondary xylem and phloem tissues are called

(a) open vascular bundles

(b) closed vascular bundles

(c) Radial vascular system

(d) Conjoint vascular system

(8) Initiation of lateral roots and vascular cambium during the secondary growth takes place in

(a) Endodermis

(b) Casparian strips

(c) Pericycle

(d) conjuctive tissue

 (9) The stem continues to increase in _____due to the activity of vascular cambium, the outer cortical and epidermis layers

(a) Length

(b) Girth

(c) Volume

(d) Surface area

10.) Cork cambium is also known as __________

a.) phellogen

b.) phellem

c.) phelloderm

d.) periderm

  • Answer in one sentence

Q.1 What is secondary growth?

Ans. The girth of most dicotyledonous plants increases which is referred to as secondary growth. The two lateral meristems, vascular cambium and cork cambium, are engaged in secondary growth.

Q.2) What is the composition of conjuctive tissue in dicot roots?

Ans. Conjuctive tissue is made up of parenchymatous cells that reside between the xylem and the phloem.

Q.3) Give the function of Heartwood and sapwood respectively?

Ans. Heartwood mainly provides mechanical support to the plants whereas sapwood is involved in conduction of water.

Q.4) What are lenticels? What is its function?

Ans. Lenticels are parenchymatous cells that rupture the epidermis in the phellogen, generating lens-shaped pore. Lenticels allow gases to be exchanged with the atmosphere and the stem’sinternal tissue.

Q.5) What is protophloem and meta phloem?

Ans. Protophloem is the first created primary phloem, which has tiny sieve tubes, and meta phloem is the second formed primary phloem, which has larger sieve tubes.

Q.6) What are the components of epidermal tissue system

Ans. Epidermal cells, stomata, and epidermal appendages like as trichomes and hairs make up the epidermal tissue system, which covers the entire plant body.

Q.7) What is the location of stomata in plant and state its function?

Ans. The epidermis of leaves has pores or openings called stomata. The process of transpiration and gas exchange is regulated by stomata.

Q.8) What is stele made up of in dicot roots?

Ans. The stele is made up of all tissues on the inner side of the endodermis, such as the pericycle, vascular bundles, and pith.

  • Answer in short

Q.1) What is tissue? State the different type of tissues in plant cells.

Ans. 1.) A tissue is a collection of cells that possess a same origin and typically execute the same function.

2.) Different types of tissues make up a plant.

3.) Tissues are divided into two categories: meristematic and permanent tissues, based on whether or not the cells forming them are capable of dividing.

Q.2) What is the key difference between spring wood and autumn wood?

Ans. 1.) Spring wood, also known as early wood, is formed during this season.

2.) Cambium is particularly active in the spring season, producing a significant number of xylem components possessing wide vessels.

3.) Spring wood has low density and light color

4.) Autumn wood or late wood is formed when the cambium is less active in the winter and produces fewer xylem elements with thin and narrow vessels.

5.) Autumn wood has high density and dark color.

Q.3) What are the different components of xylem tissue, state its functions.

Ans. 1.) Xylem is composed of four different kinds of elements: tracheid’s, vessels, xylem fibers and xylem parenchyma

2.) Tracheid’s and vessels are the main water transporting elements in flowering plants.

3.) The plant body is supported mechanically by xylem fibre cells.

4.) Food elements such as carbohydrates or fat, as well as other compounds such as tannins, are stored in the xylem parenchyma

Q.4) What are the major differences between protoxylem and metaxylem

Ans. 1.) Protoxylem refers to the first created primary xylem elements, while metaxylem refers to the later formed primary xylem components.

2.) The protoxylem is located at the organ’s centerin the pith and the periphery of the root, while the metaxylem is located near the periphery of the organs and in center of the roots.

3.) Endarch is the name for this sort of primary xylem and Exarch is the name for this type of primary xylem configuration.

  • Answer in brief

Q.1) Distinguish between monocot and dicot roots

Ans. The following characteristics can be used to distinguish if it is a monocot or a dicot Roots:

Monocot roots

Dicot roots
Pith is large and well developed.

The pith is small or inconspicuous.

Plant roots have a root-like structure that is considerably broader and fibrous.

The tap root-like structure of plant roots is fairly thin.
They have large number of xylem tissue

They have large number of xylem tissue

No secondary growth is seen in monocot roots

Secondary growth is seen in dicot roots.

Q.2) Explain in brief the anatomy of Monocotyledonous Leaf.

Ans.1.) Monocotyledonous leaves are also called isobilateral leaves.

2.) The epidermis has stomata on both surfaces, and the mesophyll does not divide into palisade and spongy parenchyma.

3.) Certain adaxial epidermal cells along veins in grasses transform into huge, empty, colorless cells known as Bulliform cells.

4.) The leaf surface is exposed when the bulliform cells in the leaves have absorbed water and are turgid.

5.) They curl the leaves inwards to reduce water loss when they are flaccid due to water stress.

6.) Monocot leaves have parallel venation which is represented in the near comparable diameters of vascular bundles (except in major veins).

Q.3) What is simple plant tissue? Describe the structure and function of any one  simple tissue in plant cells?

Ans. 1.) Simple tissues, such as parenchyma, collenchyma, and sclerenchyma, are made up of only one type of cell.

2.) Parenchyma cells: Within the plantorgans, parenchyma is the most important component.

3.) The parenchyma cells are spherical, oval, round, polygonal, or elongated in shape and are generally isodiametric.

4.) The walls are constructed of cellulose and are quite thin.

5.) They might be densely packed or have little intercellular space.

6.) Photosynthesis, storage, and secretion are all processes performed by the parenchyma.

Q.4) Give prominent characters of collenchyma and sclerenchyma cells.

Ans. A.) Collenchyma:

1) In most dicotyledonous plants, the collenchyma is found in layers beneath the epidermis.

2) It can be found as a single layer or in patches.

3) The corners of the cells have thickened due to the deposition of cellulose, hemicellulose, and pectin.

4) The cells might be oval, round, or polygonal, and chloroplasts are frequently present.

5) Food is assimilated by chloroplast-containing cells.

6) There are no intercellular spaces. They sustain the plant’s growth portions, such as the young stem and leaf petiole, mechanically.

B.) Sclerenchyma:

1.) Long, narrow cells with thick, lignified cell walls and a few or many pits make up sclerenchyma.

2.) They are frequently devoid of protoplasts and lifeless.

3.) Sclerenchyma can be classified as fibers or sclereids based on differences in form, structure, origin, and development.

4.) Fibers are thick-walled, elongated, and pointed cells that can be found in groups throughout the plant.

5.) Sclereids are dead cells that are spherical, oval, or cylindrical in shape and have very thin cavities (lumen).

6.) These are often found in nut fruit walls, fruit pulp such as guava, pear, and sapota, legume seed coats, and tea leaves. Organs are supported mechanically by sclerenchyma.

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