Class 11 Biology Important Chapter 6 Anatomy of Flowering Plants

Class 11 Biology Important Chapter 6 Anatomy of Flowering Plants Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Biology Important Solutions and select need one. AHSEC Class 11 Biology Additional Notes English Medium Download PDF. HS 1st Year Biology Important Solutions in English.

Class 11 Biology Important Chapter 6 Anatomy of Flowering Plants

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 11 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 1st Year Biology Important Notes in English for All Chapters, You can practice these here.

Anatomy of Flowering Plants

Chapter: 6

IMPORTANT QUESTION AND ANSWER

Very Short and Short Answer Type Question: 

1. What is the living cell in xylem.

Ans. Xylem parenchyma.

2. What is the function of phloem parenchyma?

Ans. They store food, resins, latex, mucilage.

3. Give one functional difference between phellogen and phelloderm.

Ans. The pericycle layer forms a secondary meristem called cork cambium or phellogen. The cells of phellogen divide to form parenchymatous tissue towards the inner side called secondary cortex or phelloderm.

4. What is the function of the cuticle in plants?

Ans: The cuticle is a waxy, waterproof layer present on the outer surface of epidermal cells (except roots). Its main function is to prevent excessive water loss from the plant surface and protect against mechanical injury and infection.

5. Write the function of companion cell?

Ans. Nuclei of companion cells control the activity of sieve tube. Companion cells also help in maintaining a proper pressure gradient in the sieve elements.

6. What are the functions tracheids?

Ans. Tracheids transport water and give mechanical support to the tree.

7. What is phellogen?

Ans. It is cork cambium which cuts the cells upper side and lower side. The upper side cells form phellem (cork) and lower side cells form phelloderm. The phellem, phellogen and phelloderm constitute the periderm.

8. What is the significance of secondary growth in plants?

Ans: Secondary growth increases the thickness/girth of stems and roots, providing mechanical strength and allowing the plant to support larger branches and leaves. It occurs mainly in dicots due to the presence of vascular cambium.

9. What do you mean by open and closed vascular bundles?

Ans: Open vascular bundles contain a layer of cambium between xylem and phloem and can produce secondary tissues. Found in dicots.

Closed vascular bundles lack cambium and do not produce secondary tissues. Found in monocots.

10. Explain the role of the endodermis and Casparian strips in roots.

Ans: Endodermis is the innermost layer of the cortex, made of tightly packed cells with Casparian strips waterproof bands of suberin in the cell walls. They prevent the passive flow of water and dissolved substances, ensuring selective absorption and forcing water to enter vascular tissues through the cytoplasm of cells.

11. Write one point of difference between fibres and sclereids.

Ans: 

Fibres	Sclereids
More elongated sclerenchymatous cells called fibres.	Thick walled, lignified short sclerotic cells, called sclereids.

12. Differences between Dicotyledonous Plants and Monocotyledonous Plants.

Ans: 

Dicotyledonous Plants	Monocotyledonous Plants
(i)Two cotyledons (seed leaves).	(i) One cotyledon (seed leaf).
(ii) Root with few xylem bundles (4-5), small or absent pith.	(ii) Root with many xylem bundles (>6), large pith.
(iii) Vascular bundles in stem arranged in a ring.	(iii) Vascular bundles in stem scattered.
(iv) Leaf venation is reticulate (net-like).	(iv) Leaf venation is parallel.
(v) Stomata mostly on lower leaf surface.	(v) Stomata on both leaf surfaces.

13. What is the function of root hairs?

Ans: Root hairs are unicellular outgrowths of epidermal cells that increase the surface area of roots, enhancing the absorption of water and minerals from the soil.

14. Describe the structure and function of stomata.

Ans: Stomata are small pores found mainly on the leaf epidermis. Each stoma is surrounded by two bean-shaped guard cells that control the opening and closing of the pore. Stomata regulate gas exchange (CO₂ in, O₂ out) and transpiration (water vapor loss), which helps in cooling the plant and maintaining water balance.

15. Describe the bulliform cells with functions.

Ans. Isobilateral leaf IS Upper or adaxial epidermis has large thin walled protruding and turgid cells over the region of veins called bulliform or motor cells. These cells are highly vacuolate and can store water. The bulliform cells are also useful in the unrolling of leaf during its development.