ANSWER : saw dust is poor conductor of heat

Explanation : : Saw dust is poor conductor of heat.Hence,ice is packed in saw dusts

ANSWER : less density than dry air

Explanation : X-rays can be used opt1:to detect heart diseases opt2:to detect defects in precious stones and diamonds opt3:to defect gold under the earth opt4:for cutting and welding of metals ans: to detect defects in precious stones and diamonds Exp: X-rays is a form of electro magnetic radiation

ANSWER : rich is essential amino acids

Explanation : It is easy to burst a gas filled balloon with a needle than with a nail.It is because opt1:nail exerts more pressure than needle on the balloon opt2:needle exerts more pressure than nail on the balloon opt3:gas is reactive with the needle opt4:nail is more longer than needle ans: needle exerts more pressure than nail on the balloon Exp: Pressure=Force/ Area of contact Surface area of needle is less than that of nail =>needle exerts more pressure on the bottom

ANSWER : Mitochondria

Explanation : : Mitochondria DNA is found outside the nucleus

ANSWER : Haliotis

Explanation : : Haliotis belong to the class of mollusks having s shell consists of one piece. Haliotis means 'sea ear'