How does the cork act as a protective tissue

Cork is a protective tissue with dead suberin rich cells that forms thick and waterproof covering of older stem and root. Suberin is a waterproofing waxy substance which restricts water movement. Presence of suberin in dead cells of cork and absence of intercellular spaces makes the cells impermeable to water and gases thereby protecting the underlying tissues from desiccation, mechanical injury and pathogenic infection. Which of the following statement (s) is/are true? (A)Uneven thickening of cell wall is characteristic of sclerenchyma. (B)Periblem forms cortex of the stem and the root. (C)Tracheids are the chief water transportingelements in gymnosperms. (D)Companion cell is devoid of nucleus atmaturity. (E) Commercial cork is obtained from Quercus suber.

Epidermal cells • The epidermis cells is a single-layered group of cells that covers plants' leaves, flowers, roots and stems. • It forms a boundary between the plant and the external environment. • The epidermis serves several functions, it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients.

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Tissues Questions and Answers Class 9 Page-69 Q1.What is a tissue? Solution:Tissue is a group of cells that are similar in structure and are organised together to perform a specific task. Q2. What is the utility of tissues in multi-cellular organisms? Solution:In unicellular organisms, a single cell performs all the basic functions such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues. These tissues are specialised to carry out a particular function at a definite place in the body. For example, the muscle cells form muscular tissues which help in movement, nerve cells form the nervous tissue which helps in transmission of messages. This is known as the division of labour in multicellular organisms. It is because of this division of labour that multicellular organisms are able to perform all functions efficiently. Page-74 Q1.Name types of simple tissues. Solution:Simple permanent tissues are of three types: Parenchyma, Collenchyma, and Sclerenchyma. Parenchyma tissue is of further two types – Aerenchyma and Chlorenchyma. Q2. Where is apical meristem found? Solution:Apical meristem is present at the growing tips of stems and roots. Their main function is to initiate growth in new cells of seedlings, at the tip of roots, and shoots. Q3.Which tissue makes up the husk of coconut? Solution:The husk of a coconut is made up of sclerenchyma tissue. Q4.What are the constituents of phloem? Solution:Phloem is the fo...

• Cork is a protective tissue with dead suberin rich cells that forms a thick and waterproof covering of older stems and roots. • Suberin is a waterproofing waxy substance which restricts water movement. • The presence of suberin in dead cells of cork and the absence of intercellular spaces makes the cells impermeable to water and gases thereby protecting the underlying tissues from desiccation, mechanical injury and pathogenic infection.

Epidermal cells • The epidermis cells is a single-layered group of cells that covers plants' leaves, flowers, roots and stems. • It forms a boundary between the plant and the external environment. • The epidermis serves several functions, it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients.

• Cork is a protective tissue with dead suberin rich cells that forms a thick and waterproof covering of older stems and roots. • Suberin is a waterproofing waxy substance which restricts water movement. • The presence of suberin in dead cells of cork and the absence of intercellular spaces makes the cells impermeable to water and gases thereby protecting the underlying tissues from desiccation, mechanical injury and pathogenic infection.

Tissues Questions and Answers Class 9 Page-69 Q1.What is a tissue? Solution:Tissue is a group of cells that are similar in structure and are organised together to perform a specific task. Q2. What is the utility of tissues in multi-cellular organisms? Solution:In unicellular organisms, a single cell performs all the basic functions such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues. These tissues are specialised to carry out a particular function at a definite place in the body. For example, the muscle cells form muscular tissues which help in movement, nerve cells form the nervous tissue which helps in transmission of messages. This is known as the division of labour in multicellular organisms. It is because of this division of labour that multicellular organisms are able to perform all functions efficiently. Page-74 Q1.Name types of simple tissues. Solution:Simple permanent tissues are of three types: Parenchyma, Collenchyma, and Sclerenchyma. Parenchyma tissue is of further two types – Aerenchyma and Chlorenchyma. Q2. Where is apical meristem found? Solution:Apical meristem is present at the growing tips of stems and roots. Their main function is to initiate growth in new cells of seedlings, at the tip of roots, and shoots. Q3.Which tissue makes up the husk of coconut? Solution:The husk of a coconut is made up of sclerenchyma tissue. Q4.What are the constituents of phloem? Solution:Phloem is the fo...

• Login • Category • Java • JSP • iOS • HTML • Android • Python • C Programming • C++ Programming • C# • PHP • CSS • Javascript • jQuery • SAP • SAP HANA • Data Structure • RDBMS • MySQL • Mathematics • 8085 Microprocessor • Operating System • Digital Electronics • Analysis of Algorithms • Mobile Development • Front End • Web Development • Selenium • MongoDB • Computer Network • General Topics • Trending Categories • Data Structure • Networking • RDBMS • Operating System • Java • MS Excel • iOS • HTML • CSS • Android • Python • C Programming • C++ • C# • MongoDB • MySQL • Javascript • PHP • Physics • Chemistry • Biology • Mathematics • English • Economics • Psychology • Social Studies • Fashion Studies • Legal Studies • Selected Reading • • • • • • • Introduction Optical Character Recognition (OCR) plays an instrumental role in digitizing printed text, allowing it to be edited, searched, and stored more compactly. One of the most powerful OCR tools available is Tesseract OCR. This article will explore how to use Tesseract OCR with Java, providing detailed examples to enhance your understanding. What is Tesseract OCR? Tesseract OCR is an open-source OCR engine sponsored by Google that can recognize more than 100 languages out of the box. It's widely regarded for its accuracy and adaptability, making it a popular choice for developers across various applications. Integrating Tesseract OCR with Java ... Read More Introduction In the world of cybersecurity, task hijacking in A...