How are a scuba diver’s eardrums able to withstand the steadily increasing water pressure as he descends?

B. Mukesh, Chennai

Is it true that regular intake of honey fights obesity? If so how and to what extent, also how to find out if the honey is pure?

S. Kapali, Uthagamandalam, Tamil Nadu

Do plants and trees have an organ or mechanism equivalent to brain in animals that controls and regulates their activities such as germinating, sprouting, leafing, branching, budding, flowering, yielding fruits, shedding leaves etc?

R.D.B. Mukund, Bangalore

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