The letters "p" and "s" stand for primary and secondary, but they can also be thought of in terms of how they move, p is for "pressure", and s for "shearing", the term "shearing" is a term that means the side-to-side motion of those waves. These waves are "surface waves", waves that travel on the surface of the Earth instead of through it.
<span>I believe the answer is: D. proteins
The main functions of these proteins is to allow specific substance to pass through the membrane of the cells which needed for the energy formation for cells'functions.It created through the combination of more than 20 amino acids with different functions.</span><span />
<span>Cyanobacteria is the answer to your question</span>
They have a nerve tissue located in the head end that can detect objects through its sense organs. The sense organs are sensitive to light, touch and vibrations.
The Incubator made it possible to maintain a controlled environment for cell cultures because most modern incubators act as a petri dish but in a more controlled state.