Final answer:
A frog ventilates its lungs by first lowering its jaw, which increases the volume of the mouth cavity, thus according to Boyle's law the statement is true. A frog does ventilate its lungs according to Boyle's law by lowering its jaw to increase the mouth cavity volume, which decreases pressure and allows air to flow in. Hence, option A True is correct answer.
Step-by-step explanation:
The statement that a frog ventilates its lungs by first lowering its jaw, which increases the volume of the mouth cavity according to Boyle's law, is true. Boyle's law states the pressure of a gas is inversely proportional to its volume. In the context of frog respiration, when a frog lowers its jaw, it increases the volume of its mouth cavity.
As a result, this action decreases the air pressure inside the cavity according to Boyle's law, allowing air to flow into the lungs due to the pressure gradient between the environment and the mouth cavity.
Hence, option A True is correct answer.