Which of the following characteristics apply to all amphibians? (Choose all that apply) A. ectothermic
B. permeable skin
C. metamorphosis involving two or more distinct stages
D. lungs instead of gills

because the light is a great source of energy for the plants to survive. (i hope this )

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.