Living organisms respond to their environment by chemical changes or by reaction to

a: muscle contractions
b: nerves

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

a. to encourage apoptosis

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )