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potassium-40
cobalt-60
iodine-131
plutonium-238
The range of R.B.C to W.B.C in the human body is
The red blood cells are produced by the
The red colour of human blood is due to
The red, orange and yellow colours of leaf is due to :
The region of the brain that integrates visceral activities, body temperature, and heartbeat is the
The release of the egg/ovum from the ovary is called
The release of Which among the given into ponds & wells helps in controlling mosquitoes -
The resources which are obtained from bio sphere & have life are:
The retention of urea in the blood in the marine environment, as a means to osmoregulate, is best seen in
The RH factor refers to