Marking scheme of test assignment Class X

Get it checked by your parents with these answers  and post marks with name and section under this post .

A1  Absorption of light by chlorophyll

A2  Water splits to release oxygen

A3   Transpiration and exchange of gases.

A4  Tyrgidity of guard cells or you can say water content of guard cells .

A5  Bile is produced in liver
Function
(1)  Emulsification of fats or breaking large fat globules into simpler globules
(2)  Changing medium to basic from acidic by bicarbonate salts present in it .

A6   The movement of food in Oesophagus is through muscular movement called peristalsis.

A7  Aerobic respiration occurs in mitochondria .

End products are carbon dioxide  ,water and energy in the form of ATP

A8 Alveoli

A 9 feature :
(1)Large surface area, (2)Thin membrane (3) Rich supply of blood

A10
 (1) Prevents food or water from entering trachea while eating or drinking
(2) Separates thorax from abdomen/helps in breathing
(3)Prevents trachea from collapsing when there is no air
(4)Produces sound by vibration
(5)Protecting the lungs and heart from damage and shock

A 11 Function of Hcl --Kills germs and makes the medium acidic for the enzymes to act
         The lining of stomach is protected by layer of mucus present inside which will not  allow to affect the living of stomach.