AP BIOLOGY

Detailed explanation-1: -A simple compass can detect a magnetic field and demonstrate its direction. Iron filings can be used to show the shape of a magnetic field. At the sophisticated level, a gaussmeter can detect a field and indicate its strength, as measured in gauss units.

Detailed explanation-2: -Searching for magnetoreceptors Receptors for senses such as olfaction and vision must make contact with the external environment, but magnetoreceptors might plausibly be located almost anywhere inside an animal’s body. Second, magnetoreceptors might be tiny and dispersed throughout a large volume of tissue.

Detailed explanation-3: -magnetometer, , instrument for measuring the strength and sometimes the direction of magnetic fields, including those on or near the Earth and in space. Magnetometers are also used to calibrate electromagnets and permanent magnets and to determine the magnetization of materials.