A. Most amphibians exchange respiratory gases with in the larval stage, and in adulthood.
b. Most amphibians have a moist skin, which helps to draw oxygen through the
skin. This kind of respiration is called . They can also respire through the buccal cavity. This is called .
c. List at least two structural changes that assisted with the ventilation of lungs

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

me and my friend did 2

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.