Material through which water flows is permeable. This material can be either natural or artificial. Naturally permeable material can be clean sand and gravel for example, or a sandstone and in the latter case the sandstone can have both porosity which is not synonymous with permeability as the pores must be connected to be permeable. An impermeable membrane could be used to line ditches for example to prevent leakage near mines.
They all have a true nucleus and complex cellular organelles and are large and eukaroyote
Answer:
Most adult amphibians can breathe both through cutaneous respiration and buccal pumping though some also retain gills as adults.
Explanation:
