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Hindi Question English Question Answers Marks Category Manage
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What is the utility of tissues in multi-cellular organisms?
In multicellular organisms, tissues are differentiated to carry out a specific function at a definite place which is known as the division of labour. For instance, nerve cells form. the nervous tissue that helps in the transmission of messages whereas muscular cells form muscular tissue that help in movement. In multicellular organisms, several cells are grouped to form tissues. These tissues perform particular function at a definite place in the body. For example, nerve cells from the nervous tissue which helps in transmission of messages. This is known as division of labour in multicellular organisms.
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Name the types of simple permanent tissues.
These tissues are simple. They are made up of only one type of cell. Here, all the cells that make up the tissue are similar and have the same structure, with the same type parts.Parenchyma, Collenchyma, and Sclerenchyma. Parenchyma tissue is further divided into aerenchyma and chlorenchyma
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Where is apical meristem found?
Apical Meristem is present at the growing tips of stem and roots and increases the length of stem and root.
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Which tissue makes up the husk of coconut?
Sclerenchyma tissue: Sclerenchyma. plant tissue. Sclerenchyma, in plants, support tissue composed of any of various kinds of hard woody cells. Mature sclerenchyma cells are usually dead cells that have heavily thickened secondary walls containing lignin.Sclerenchyma- The cells of this tissue are dead. They are rigid, contain thick and lignified secondary walls. Their main function is to provide strength and support to parts of the plant. Tracheids are dead and lignified cells. They are found mainly in the cortex of stems and in leaves. The major function of sclerenchyma is support. Unlike collenchyma, mature cells of this tissue are generally dead and have thick walls containing lignin. Their size, shape, and structure vary greatly.
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What are the constituents of phloem?
Phloem is the food conducting tissue in plants. It is made up of four components: Sieve tubes, Companion cells, Phloem parenchyma and Phloem fibres. Phloem is the vascular tissue responsible for the transport of sugars from source tissues (ex. photosynthetic leaf cells) to sink tissues (ex. non-photosynthetic root cells or developing flowers). Other molecules such as proteins and mRNAs are also transported throughout the plant via phloem.
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Name the tissue responsible for movement in our body.
Muscular tissue (Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract. This is opposed to other components or tissues in muscle such as tendons or perimysium. It is formed during embryonic development through a process known as myogenesis.) FUNCTIONS: The main function of the muscular system is movement. Muscles are the only tissue in the body that has the ability to contract and therefore move the other parts of the body. Related to the function of movement is the muscular system's second function: the maintenance of posture and body position. TYPES (The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control) Skeletal muscle tissue is found in our skeletal muscles; for example, the biceps. Cardiac muscle is found in our heart, and smooth muscle is found in our visceral, or hollow, organs - for example, blood vessels and intestines.
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Give three features of cardiac muscles.
Cardiac muscle (heart muscle) is one of the three main types of muscle in vertebrates. It is involuntary: a person cannot control it consciously. Also, it is a striped muscle in the walls of the heart. It makes up the tissue called the myocardium. The other types of muscle are the skeletal and smooth muscle. ● Cardiac muscles are called involuntary muscles. ● They are cylindrical, branched and uninucleate. ● They show rhythmic contraction and relaxation throughout life.
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How are simple tissues different from complex tissues in plants?

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What is the specific function of the cardiac muscle?
The function of the cardiac muscle is to control the contraction and relaxation of the heart.
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Identify the type of tissue in the following: skin, the bark of a tree, bone, lining of kidney tubule, vascular bundle.
Skin: Stratified squamous epithelial tissue The bark of tree: Simple permanent tissue Bone: Connective tissue The lining of kidney tubule: Cuboidal epithelial tissue Vascular bundle: Complex permanent tissue
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What is the role of the epidermis in plants?
Epidermis, in botany, outermost, protoderm-derived layer of cells covering the stem, root, leaf, flower, fruit, and seed parts of a plant. The epidermis and its waxy cuticle provide a protective barrier against mechanical injury, water loss, and infection.The epidermis is a single layer of cells that covers the leaves, flowers, roots and stems of plants. It forms a boundary between the plant and the external environment.Epidermis performs the following functions. ● It protects all the parts of the plant. ● Epidermal cells on the aerial parts of the plant often secrete a waxy, water-resistant layer called cuticle which is made of cutin on their outer surface for protection against loss of water, mechanical injury and invasion by parasitic fungi. ● Epidermal cells in roots, help in absorption of water.
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How does the cork act as a protective tissue?
The bark of a tree is known as the cork which is made up of dead cells. It protects the plant against mechanical injury, temperature extremes, it also prevents the loss of water by evaporation.
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