The microscopic stomatal pores provide a pathway for diffusional movement of gases across the epidermis and cuticle

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#Question id: 3891

#XL - Q Biochemistry

Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs.  In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition?

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#Question id: 19859

#XL - P Chemistry

According to Bohr’s atomic model

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#Question id: 20145

#XL - P Chemistry

The radius of first Bohr orbit is , then de-Broglie wavelength of electron in 3rd orbit is nearly

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#Question id: 9615

#XL - R Botany

In angiosperm plants, flower morphology can be very intricate. If a tree, such as a New Mexico locust, has flowers that share many morphological intricacies with flowers of the sweet pea vine, then the most likely explanation for these floral similarities is the same general explanation for the similarities between the

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#Question id: 19670

#XL - P Chemistry

Ethers may be used as solvents because they react only with which of the following reactants?