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.

TLS Online TPP Program

#Id: 9375

#XL - T Zoology

Behavior is the observable response of organisms to their stimuli.

TLS Online TPP Program

#Id: 9376

#XL - T Zoology

Behavior contributes to the different survival and reproduction of organisms.

TLS Online TPP Program

#Id: 9377

#XL - T Zoology

Innate behavior - comes from an animal's heredity.

Instinct (nature), in which adaptation occurs over generations by selection.

TLS Online TPP Program

#Id: 9378

#XL - T Zoology

Learned behaviors - which are genetically hardwired and can be performed without any prior experience or training.

TLS Online TPP Program

#Id: 9379

#XL - T Zoology

Caused of behaviour

Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines

Ultimate causes - Their historical causes, especially the action of natural selection

TLS Online TPP Program

#Id: 9380

#XL - T Zoology

Innate behaviour

Reflex - Allow us to move in response to something in the environment.

The reflex which causes us to close our eyes when something flashes towards us, or to withdraw a foot when we step on a sharp object.