A theory is an idea that has yet to be proven by experimentation. A law is a theory that has been proven correct.
3 examples would be touch, light and chemical.
and the most common signal would be chemical.
Hope this helps! (:
The characteristics that apply only to prokaryotes from the list given above would be as follows:
-These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Hope this answers the question. Have a nice day.
Answer:
competition
Explanation:
After an ecosystem has been destroyed because of certain catastrophe and all of the space that it occupied is totally cleared and open for overtaking, the primary succession comes in action. When the primary succession occurs, there's no competition, as pretty much everything has been destroyed from the previously existing ecosystem. The pioneers of the primary succession are organisms that do not require a lot to prosper, such as the mosses and lichens. As they start to cover the barren land, little by little they manage to change the composition of the rocks, thus resulting in the formation of the first soils. As that happens, the secondary succession comes on the horizon as now it has conditions for it, so the species from it overtake and replace the species form the primary succession.
For the answer to the question above, the answer is plasmas.
Plasma<span> is a form of matter in which many of the electrons wander around freely among the nuclei of the atoms. </span>Plasma<span> has been called the fourth state of matter, the other three being solid, liquid, and gas. The electrons in a solid, liquid, or gaseous sample of matter stay with the same atomic nucleus.
I hope I helped you with my answer</span>
