Explanation:
Dermatogen is also known as protoderm. It further divides to form the three dermal layers - epidermis, endodermis and hypodermis.These form the protective layers of the plant.
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Under the microscope, striated muscles show alternate light and dark bands or striations when stained appropriately. As a result, they are also called striated muscles.
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It is composed of a single layer of cube-like cells. It is found in kidney tubules and salivary glands. It provides mechanical support to organs and helps in absorption and excretion.
Explanation:
The cork cells are dead and lack inter cellular spaces. Its cells, whose walls are impregnated with suberin, are arranged in radial rows and fit closely together except where the cork is interrupted by lenticles.
Explanation:
Muscles help in movement and therefore contains contractile proteins.
Explanation:
Contractile proteins are found in the muscles. Contractile proteins of muscle are actin and myosin, the main components of the thin and thick filaments, respectively. The cytoplasm of cells is a colloidal network of contractile proteins. Actin filaments are the major components of this network.
Explanation:
Contractile proteins are found in muscles, as they are associated with the movement of body or limbs. The contraction and relaxation of contractile proteins, present in muscles bring about movements of limbs, internal organs, etc. The bones are the major supporting tissue which form the endoskeleton of a vertebrate body. Blood is a fluid connective tissue responsible for transport of oxygen, nutrients, hormones etc,, and for producing antitoxins and antibodies, etc.
Cartilage provides support and flexibility to the body parts and smoothens surface at joints.
Explanation:
As epidermis is formed of cutin, suberin gives rise to cork cells which makes them impervious to gas and water. No other given option is formed from suberin.
Explanation:
The collenchyma is found in few layers below the epidermis of plant. It is generally absent in monocot stems and leaves. The cell wall is unevenly thickened.
Explanation:
Collenchyma tissue are found below epidermis in leaves and stem.
Explanation:
The nature of matrix differs according to their function for, e.g. Cartilage has calcium salts as it provides support to bones whereas muscles passes contractile proteins for their function of movement.
Explanation:
Sieve tubes have the perforated walls instead of the companion cells. Companion cells remain associated with the sieve tubes.
Explanation:
Erythrocytes are red blood cells, that are involved in delivering oxygen to various tissues.
In humans, these becomes anuclated as they get mature for providing more space for hemoglobin.
Explanation:
Kidney is composed of different kinds of epithelial tissues.
Explanation:
Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscles, with the other two being skeletal and smooth muscles. It is an involuntary, striated muscle that constitutes the main tissue of the walls of the heart.
Explanation:
Cardiac muscle fibres are branched, striated and involuntary. These muscles are exclusively present in the heart.
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It is composed of a single layer of tall and slender cells. Their nuclei are located at the base. Free surface may have microvilli. It is generaly found in the lining of stomach and intestine and help in secretion and absorption.
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Bone cells are embedded in a hard matrix which is composed of calcium and phosphorus.
Explanation:
Connective tissues are the tissues that connect the different parts of the body.
Bone and cartilage are the specialized supporting connective tissues.
They give shape and size to the external and internal structure of the body. Muscles, nerves and epithelium are separate types of tissues with distinct functions.
Explanation:
A dipose tissue is fat storing connective tissue which is found mainly beneath the skin. Blubber of whale and hump of camel are adipose tissue which store fat.
Explanation:
Areolar connective tissue is found between the skin and muscles, around blood vessels and nerves and in the bone marrow. It fills the space inside the organs, supports internal organs and helps in repair of tissues.
Explanation:
Ligaments join one bone to another bone and hence ligament break can result in dislocation.
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They can be thin walled or thick walled and have permanent shape. Permanent tissues can be simple or permanent complex tissues. Complex permanent tissue is made up of a group of same type of cells which have common origin and function. Xylem and phloem are complex tissues and form vascular tissue of the plant.
Explanation:
Longitudinal growth in stem takes place at the top. So, portion below the apical meristem will remain at a constant level even after growth.
Explanation:
Xylem vessels are very long tube-like structures formed by a row of cells placed end to end. The transverse wails between these cells are partially or completely dissolved to form continous water channels.
Explanation:
Collenchyma has no role in transport of water. Parenchyma is a supportive tissue and has nothing to do with conduction of water. The xylem vessels also known as xylem tracheae are the most active water conducting elements.
Explanation:
All cells are living except the Phloem fibres (Phloem fibres are dead cells).
Explanation:
Are groups of similar cells with the same functions and origin.
Organelles are small bodies within a cell with specific functions.
Organs are made of a group of tissues that function together.
Organ systems are made up of a group of organs that functions together.
Explanation:
A group of cells that are similar in structure and/ or work together to achieve a particular function forms a tissue.
Explanation:
Adipose tissue stores fat and since fat is a bad conductor it acts as an insulator and prevents loss of heat from the body. Therefore, a fatty person is less affected by cold.
Explanation:
The cambium is the zone where the woody stem of a plant will thicken over time (ie. tree rings) and is the site of cell division of new vascular tissue as a woody stemmed plants grow wider (lateral growth).
Explanation:
Active divisions take place in the cells of cambium. Cambium is a meristematic tissue.