Adelicate plant embryo is protected by what?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?