The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called__________?

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It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

A. Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones B. Older sediment layers have less amount of these reaioactive isotopes as that of the young ones. C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones. D. Older sediment layers … It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in...

“lubb” sound is produced due to___________________?

A. Opening of inlet valve B. Closure of inlet valve C. Opening of outlet valve D. Closure of outlet valve...

The stent energy in the form of ADP is regenerated by mitochondria into__________?

A. AMP B. ADP C. ATP D. All of these...

Which of the following fishes excrete large volume of diluted urine?

A. Bony Marine fishes B. Fresh water fishes C. Both depending upon the surrounding water D. None of these...

Snails belong to__________?

A. Cephalopodsxc B. Gastropods C. Bivalves D. Athropods...