Facilitated diffusion occurs in the cell body. It is the process of transporting particles into and out of a cell membrane. Energy is not required because the particles move along the concentration gradient. Permeable means that particles, ions, or water can cross the membrane. Hope I’ve helped ;)
Cellular respiration takes place in the mitochondria
In describing the energy transfer of trophic levels, energy is lost as we move up from a lower level to a higher level. This is because energy is used when for example a primary consumer does body processes before it is eaten by another consumer. hence the lowest trophic level belongs to those which <span>2) has the greatest biomass</span>
Given that,
The speed of a wave, v = 200 m/s
Wavelength, 
We need to find the frequency of this wave. The relation between wavelength, frequency and the speed is given by :
So, the frequency of this wave is 100 Hz.
