state the main features of muscular tissue.
20. Differentiate between meristematic tissue and permanent
21. A coin of mass 1 kg and a stone of mass 5 kg are thrown de
10 m/s?. Which one would reach theground early and why
22. Give three applications of third law of motion.
23. Classify the following into elements, compounds and mi
(a) Soil (b) Magnesium (c) Salt solution (d) carbon dioxi
OR
Write three differences between physical changes and che
74. How will you separate iron filings and ammonium chl
Answers
Answer:
All muscle cells share several properties: contractility, excitability, extensibility,and elasticity : Contractility is the ability of muscle cells to forcefully shorten.
Extensibility is the ability of a muscle to be stretched. For instance, let's reconsider our elbow flexing motion we discussed earlier.
20.) Meristematic Tissue :
Meristematic tissues in plants consists of a mass undifferentiated cells whose main function is to participate in plant growth.
Permanent tissue:
Permanent tissues are differentiated tissues, carrying out dedicated functions.
21.) Stone will reach first because of more weight and less surface area it will experience less air resistance. Where as coin will experience air resistance an reach later.
22.) (1.) When a bullet is fired from the gun with a certain force (action) as a reaction an equal and opposite force is exerted on the gun
(2.) When you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.
23.) (1.) Soil = Mixture
(2.) Magnesium = Element
(3.) Salt Solution = Mixture
(4.) Carbon dioxide = Compound
74.) First Iron fillings are separated by using a magnet Magnet attracts Iron fillings, This iron fillings get separated. Then dissolve aluminium powder and sugar in water as aluminium is insoluble in water it will become a filtrate.
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