Best Answer: It extracts the chlorophyll so that when you test for strach with iodine the colour change is clear. when u boil a leaf in alcohol, it's chlorophyll dissolves in alcohol, leaving the leaf colourless. now when u test for starch by adding Iodine the colour change in clear. BlueAsh Â· 7 years ago.
Left atrioventricular valve (Mitral valve). The mitral valve is located within the heart. It lies between the left atrium and the left ventricle. The mitral valve opens to increased pressure as the left atrium fills with blood.Blood flows through into the left ventricle as the heart expands (diastole).It then closes as the heart contracts (systole) and forces blood into the aorta.t lies between the left atrium and the left ventricle. The mitral valve opens to increased pressure as the left atrium fills with blood. Blood flows through into the left ventricle as the heart expands (diastole). It then closes as the heart contracts (systole) and forces blood into the aorta.
The bicuspid (or mitre) and tricuspid valves are valves controlling the blood flow in the heart. The tricuspid valve has three flaps, and bicuspid valve two. The tricuspid is â¦ located in between the right atrium and the right ventricle.nswer by Bhuvanajagan94. Confidence votes 57. from the name itself, the bicuspid valve contains two cusps or flaps and the tricuspid valve contains three cusps or flaps. they both prevent the blood from flowing back into the atria........