Answer:
cells
Explanation:
Stomata are cell structures in the epidermis of tree leaves and needles that are involved in the exchange of carbon dioxide and water between plants and the atmosphere.
Answer:
subject and predicate
Explanation:
Subject: Carl
Predicate: is wearing the shirt he got for his birthday.
Working conditions mean, the way a company or a job place their enviroment. Cleanliness, the way they treat their employees,coworkers and customers, management, etc.

The harmonic frequency refers to the resonant frequency that is an integral multiple of the fundamental frequency, harmonics are usually simple sinusoidal oscillation at a single frequency. where as Resonance frequency are frequencies that are not necessarily sinosudal or integral multiple of fundamental frequency and it may have complex oscillations made up of multiple harmonics ~
It's like if you play a piano with a single key, it will show harmonic frequency, but if you use multiple keys at a time it may show Resonance.