One difference between mechanical and electromagnetic waves is that mechanical waves need a medium to pass through (solid, liquid, gas). EM waves can travel through matter or though a vacuum. In regards to telecommunications, EM waves can be radio waves, these are used in TV's, phones, computers, radios. Mechanical waves somewhat relate to this since radios produce sound;so an EM wave would turn into a mechanical vibration inside a speaker then sound would be produced.
Answer:
Active Transport: Active transport pumps molecules through the cell membrane against the concentration gradient.
Passive transport, also known as passive diffusion, is a process by which an ion or molecule passes through a cell wall via a concentration gradient, or from an area of high concentration to an area of low concentration.
Explanation:
Answer:
A- Glaciers
Explanation:
The most important agents in lakes formation are glacial ice movement.
The major difference between viruses and living things are that most living things can reproduce independently, whereas viruses must infect living cells in order to reproduce. The correct answer is C.
Answer an unit of measurement.
For example: inch, hour, minutes, feet, meters.
