Questions

True. Hormones are chemicals secreted and regulated by the endocrine system.

Fixed expenses are those expenses that do not change when there is a change in production or sales level.

Examples of Fixed Expenses are rent, insurance, payment on loans, salaries, advertising, etc...

The given statement option A) is False regarding energy balance.
It should be "Inactive people use less energy so they should consume fewer calories."

When traveling in a vacuum, electronic waves from the electromagnetic spectrum all travel at the same speed. Velocity is speed with direction, so they would all travel at the same velocity, realtively speaking. But frequency and wavelength are quite different.