Read the following statements and choose the option which includes only the correct ones :-
(A) Bones have a hard and pliable ground substance rich in calcium salts and collagen fibres.
(B) Bones support and protect softer tissues and organs.
(C) The bone cells (chondrocytes) are present in the spaces called lacunae.
(D) The bone marrow in some bones is the site of production of blood cells.

Select the correct statement from the following . I. Bones support and protect softer tissue and organs II. Blood is a fluid connective tissue. III. Cartilage is a type of specialised muscle tissue. IV. The bone marrow found in some bones is the site of production of leucocytes.

Consider the following statements (i) - (iii), each with one or two blanks (i) Bones have a hard and non-pliable ground substance rich in ul(1) and ul(2) which give bone its strength (ii) Some of the columnar or cuboidal cells get speciallised for secretion and are called ul(3) epithelium (iii) ul(4) junctions help to stop substances form leaking across a tissue Which one of the following options, gives the correct fills ups for the respective blanks from (1) to (4) in the statements ?

Read the following statements and select the correct option (i) Blood cells secrete fibres of structural proteins called collagen and elastin (ii) Neuroglial cells protect and support the nephrons (iii) Osteocytes are present in spaces called lacunae (iv) Striated muscle fibres are bundled together in a parallel fashion (v) Biceps are involuntary and striated.

Read the statements and choose the correct option 1.Neuroglial cells protect and support the neurons 2.Cartilage has a hard and nonpliable matrix rich in magnesium salts 3.Smooth muscles are striated 4.Chondrocytes are bone forming cells 5. Biceps are parallely bundled.

Read the following statements. (a) Matrix is very hard and non-pliable, (b) It is made up of 70% inorganic and 30% organic matter, (c) Rich in calcium salts and collagen fibres, (d) It provides structural framework to the body. The above statements are correct for which of the following tissue?

Read the following statements and choose the option which is the set of correct statements. (a) sun is the source of energy for grazing food chains. (b) in aquatic ecosystem, DFC is the major conduit of energy flow (c) some organism of DFC become prey for GFC animals. (d) ecosystem can support unlimited number of trophic levels.

Consider the following four statement (1-4) and select the option which includes all the correct ones only (1) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc (2) Body weight-wise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins then the cows pe day (3) Common button mushrooms are a very rich source of vitamin C (4) A rice variety has been developed which is very rich in calcium

Consider the following four statements (i) - (iv) and select the correct option stating which ones are true (T) and which ones are false (F) (i) The epithelium of proximal convoluted tobule (PCT) of nephron in the kidney has microvilli (ii) Simple epithelium covers the dry surface of the skin, the moist surface of buccal cavity, pharynx, inner lining of salivary glands and of pancreatic ducts (iii) The wall of internal organs such as the blood vessels, stomach and intestine contains skeletal muscle (iv) Bone marrow in some bones is the site of production of blood cells.

Read the following statements and choose the correct option w r t catecholamines (a) Water soluble hormones which interact with the membrane bound receptors (b) Work through second messenger (c) Binds to external domain of the extracellular receptor present on cell surface (d) They form hormone-receptor complex on the cell surface