Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers

تمرين 6

Plant adaptations to life on land include a(n) ______________, which reduces evaporation of water, and ______________, which open to allow gas exchange but close when ______________ is scarce. In addition, the bodies of vascular plants gain increased support from ______________ impregnated with the polymer ______________; these structures also help ______________ and ______________ to move within the plant body.