The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii.

The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 109 m; 1 pm = 1 X 10-12 m.

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#Id: 8424

#XL - T Zoology

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#Id: 9180

#XL - T Zoology

Average fitness

In a species, only 1 of every 1000 seeds survives to reproductive age, and that those that survive produce an average of 3000 seeds. 

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#Id: 9418

#XL - T Zoology

Selection favors mating displays that maximize a male’s lifetime fitness.

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#Id: 7757

#XL - Q Biochemistry

Molecules are groups of atoms that behave as a single unit.

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#Id: 9730

#XL - R Botany

Conifer resin ducts produces bicyclic monoterpenes such as a-pinene and b-pinene, monocyclic terpenes like limonene and terpinolene, and tricyclic sesquiterpenes, including longifolene, caryophyllene, and d-cadinene, as well as resin acids, which are released immediately upon damage by herbivores