12 yr ago the average age of a husband and a wife was 20 yr .The average remains the same today when they have two children. What is the present age of the youngest child if they differ in age by 2 yr.

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#Question id: 20170

#XL - P Chemistry

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at

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#Question id: 3456

#XL - T Zoology

Which scientist suggested that human social behavior may have a genetic basis?

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#Question id: 15265

#XL - S Microbiology

The growth of microorganisms in a food product is influenced by the availability of

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#Question id: 314

#XL - Q Biochemistry

Which statement explains the cleaning action of soap on greasy dishes?

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#Question id: 3673

#XL - S Microbiology

Which is a characteristic of E. coli DNA polymerases?