Tissues - Practice Test, Class 9 Science - Class 9 MCQ

• Cellulose: The cell wall of meristematic cells is primarily made up of cellulose. Cellulose is a polysaccharide that provides structural support and rigidity to the cell wall.


• Protein: While cellulose is the main component, proteins are also present in the cell wall of meristematic cells. These proteins play a role in various cellular processes and provide additional strength to the cell wall.


• Amino Acids: Amino acids are the building blocks of proteins, and they are essential for the synthesis of proteins in the cell wall of meristematic cells.

• Structural Support: The cell wall provides structural support and protection to the meristematic cells, allowing them to maintain their shape and integrity.


• Cellular Communication: The cell wall also plays a role in cellular communication, allowing for the exchange of signals and nutrients between neighboring cells.


• Cell Division: In meristematic cells, the cell wall plays a crucial role in cell division, providing a scaffold for the formation of new cell walls during the process of cell division.

• Parenchyma tissue: Parenchyma is a simple plant tissue that consists of living cells with thin cell walls. It is involved in photosynthesis, storage, and secretion.


• Phloem tissue: Phloem is a complex tissue that transports organic nutrients like sugars, from the leaves to other parts of the plant. It consists of sieve tubes, companion cells, fibers, and parenchyma cells.


• Options:




• A: Simple - This option does not match with phloem tissue, as phloem is a complex tissue.


• B: Collenchyma - Collenchyma is a type of simple tissue that provides support to the plant. It is not related to phloem tissue.


• C: Complex - This option is correct, as phloem tissue is a complex tissue that performs a specific function in the plant.


• D: Xylem - Xylem is another type of complex tissue that transports water and minerals in plants. It is not related to phloem tissue.




• Therefore, the correct answer is C: Complex.

• Sclerenchymatous tissue: The husk of a coconut is primarily made up of sclerenchymatous tissue. This tissue provides strength and protection to the coconut.

• Sclerenchyma tissue: This tissue consists of thick cell walls that are reinforced with lignin, making them rigid and providing structural support to the plant. In the husk of a coconut, sclerenchymatous tissue helps to protect the inner seed from external damage and provides strength to the coconut.

• Limited to certain regions: Plant growth is not uniform throughout the plant. Different parts of the plant grow at different rates depending on various factors such as availability of nutrients, water, and sunlight.


• Uniform in all parts: Plant growth is not uniform in all parts. Some parts of the plant, such as the roots, may grow more rapidly than others.


• Limited to top region: The growth in plants is not limited to the top region only. Different parts of the plant, including leaves, stems, and roots, contribute to overall growth.


• Limited to roots only: While roots play a crucial role in plant growth by absorbing nutrients and water from the soil, growth is not limited to the roots alone. Other parts of the plant also contribute to overall growth.

Therefore, the correct answer is that plant growth is limited to certain regions, as different parts of the plant grow at different rates depending on various factors.

• Bone is a type of connective tissue: Connective tissues are responsible for providing support and structure to the body. They are made up of cells and extracellular matrix, which includes fibers and ground substance. Bone tissue is a type of connective tissue that forms the skeletal system of the body.


• Composition of bone tissue: Bone tissue is composed of bone cells (osteocytes), collagen fibers, and mineral deposits (mainly calcium and phosphate). These components give bones their strength and flexibility.


• Functions of bone tissue: Bone tissue has several important functions in the body, including providing structural support, protecting internal organs, producing blood cells in the bone marrow, and storing minerals such as calcium and phosphate.


• Types of bone tissue: There are two main types of bone tissue - compact bone and spongy bone. Compact bone is dense and forms the outer layer of bones, providing strength and protection. Spongy bone is porous and found inside bones, providing support and flexibility.


• Role of bone tissue in the musculoskeletal system: Bone tissue works together with muscles, tendons, ligaments, and joints to allow movement and support the body. It plays a crucial role in the musculoskeletal system, which enables us to perform various physical activities.

• Cytology: Study of cells.


• Embryology: Study of the development of embryos.


• Histology: Study of tissues and their structure.


• Pathology: Study of diseases and their effects on the body.

• Histology: The study of tissues involves examining the structure, composition, and function of various types of tissues in the body. Histology plays a crucial role in understanding how different tissues work together to form organs and organ systems.


• Importance of Histology: Histology is essential in fields such as medicine, biology, and veterinary science. It helps in diagnosing diseases, understanding the mechanisms of tissue repair and regeneration, and advancing medical research and treatment.


• Techniques Used: Histologists use various techniques such as staining, microscopy, and imaging to analyze tissues at the cellular and molecular levels. These techniques provide valuable insights into the organization and function of tissues.


• Applications: Histology is applied in fields like pathology, anatomy, physiology, and pharmacology. It is used to study normal and abnormal tissues, investigate the effects of drugs on tissues, and identify biomarkers for diseases.

• Apical Meristem: Apical meristem is responsible for the length of the plant as it is located at the tips of the roots and shoots. It is responsible for the primary growth of the plant, which includes the lengthening of the plant body.


• Lateral Meristem: Lateral meristem is responsible for the secondary growth of the plant, which involves the increase in girth or width of the plant rather than the length.


• Intercalary Meristem: Intercalary meristem is responsible for growth at specific regions of the plant, such as the base of leaves or internodes, but it does not contribute significantly to the overall length of the plant.


• Epidermis: The epidermis is the outermost layer of the plant and serves as a protective barrier against environmental stresses, but it does not play a direct role in the lengthening of the plant body.

Therefore, the tissue responsible for the length of the plant is the apical meristem, which is located at the tips of the roots and shoots and is responsible for the primary growth of the plant.

• Epithelial Tissue: The inner lining of blood vessels is primarily made up of epithelial tissue. This tissue acts as a barrier between the blood and the surrounding tissues, regulating the exchange of nutrients and waste products.


• Nervous Tissue: Nervous tissue is not found in the inner lining of blood vessels. Its main function is to transmit signals throughout the body.


• Connective Tissue: Connective tissue provides structural support and connects different tissues and organs in the body. It is not the main component of the inner lining of blood vessels.


• Muscle Tissue: Muscle tissue is responsible for the contraction and relaxation of blood vessels, helping to regulate blood flow. However, it is not the primary tissue found in the inner lining of blood vessels.

Therefore, the correct answer is Epithelial tissue, as it forms the main component of the inner lining of blood vessels, also known as the endothelium.

• Uterus: Smooth muscles are present in the uterus to facilitate contractions during labor and delivery.


• Artery: Smooth muscles are found in the walls of arteries to regulate blood flow and pressure.


• Vein: Smooth muscles are also present in veins to help push blood back to the heart.


• All the above: Smooth muscles are found in all of the above structures, making option D the correct answer.

Smooth muscles are involuntary muscles that are non-striated and are responsible for various functions in the body such as controlling movement in organs, blood vessels, and other structures. They are essential for the proper functioning of the body and play a crucial role in maintaining homeostasis.

• Active division: This refers to the process of cell division where new cells are formed.


• Cells of Cambium: The cambium is a type of meristematic tissue found in plants, specifically in the vascular tissue (xylem and phloem).


• Role of Cambium: Cambium is responsible for secondary growth in plants, which leads to the formation of new xylem and phloem cells.


• Location of Active Division: Active division primarily takes place in the cambium cells, where cells divide rapidly to form new cells for growth and repair.


• Significance: This process is essential for the development and maintenance of plant tissues, ensuring the continuous growth and functioning of the plant.

• Location: Collenchyma mainly forms the hypodermis in plants.


• Structure: Collenchyma cells are elongated and have thickened cell walls, providing support and flexibility to young plant parts.


• Function: The hypodermis layer of collenchyma cells acts as a protective layer against mechanical stress and helps in the growth and development of the plant.


• Composition: Collenchyma cells are living cells with cellulose, hemicellulose, and pectin in their cell walls, allowing flexibility and strength.


• Role: Collenchyma tissues are found in stems, petioles, and leaves of plants, providing structural support and aiding in plant growth.

• Meristematic tissue: Meristematic tissue is responsible for forming new cells in plants.


• Location: Meristematic tissue is found in areas of the plant where growth is actively occurring, such as the tips of roots and shoots.


• Types: There are different types of meristematic tissue, including apical meristem, intercalary meristem, and lateral meristem.


• Function: The main function of meristematic tissue is to produce new cells for growth and repair in plants.


• Characteristics: Meristematic cells are small, have thin cell walls, and are densely packed with cytoplasm.

• Cambium: The girth of the stem or root increases due to the cambium, which is a lateral meristem responsible for secondary growth in plants.


• Apical Meristem: Apical meristem is responsible for primary growth at the tips of stems and roots, not for increasing girth.


• Intercalary Meristem: Intercalary meristem is found in grasses and is responsible for growth between nodes, not for increasing girth.


• Epidermis: The epidermis is the outermost layer of cells in plants and provides protection, but it does not contribute to the increase in girth.

• A: Some tissues in plants divide throughout the life: This statement is correct as plants have meristematic tissues that continue to divide throughout their life.


• B: Cell growth in animals is more uniform as compared to plants: This statement is incorrect as plants have indeterminate growth, meaning they continue to grow throughout their life, unlike animals which have determinate growth.


• C: Animals have more dead tissues as compared to plants: This statement is incorrect as plants have more dead tissues such as xylem and phloem, while animals have fewer dead tissues.


• D: There is no demarcation of dividing and non-dividing regions in animals: This statement is incorrect as animals have specific regions where cell division occurs, such as stem cells in various tissues.

• Location: The Haversian canals, also known as osteons, are found in compact bone tissue.


• Function: These canals contain blood vessels and nerves that supply nutrients and oxygen to the bone cells.


• Structure: Each Haversian canal is surrounded by concentric layers of bone tissue called lamellae.


• Orientation: The canals run parallel to the long axis of the bone.


• Regeneration: Haversian canals play a role in bone remodeling and repair processes.

• Humerus: The humerus is the bone located in the upper arm, and it contains Haversian canals.


• Pubis: The pubis is a part of the pelvis bone, but it does not contain Haversian canals.


• Clavicle: The clavicle, also known as the collarbone, does not have Haversian canals.


• Scapula: The scapula, or shoulder blade, does not contain Haversian canals.

Therefore, the Haversian canals occur in the humerus bone, which is the correct answer to the given question.