1. They have a slimy skin in which the oxygen gets dissolved. 2. The frog have lung instead of gills 3. They have enormous no. of nerves which help them to breathe through skin
<span>Any physical or psychological event that produces stress</span>
D. Gene splicing. They remove specific genes in order to create a transgenic organism.
Atoms, Molecules, Cells, Tissues, Organs, Organ system are all building blocks to growing an organism. Hope this helps. :)
