Algae make energy or food is through the process of photosynthesis. Photosynthesis involves the use of sunlight to synthesize carbon dioxide and water to make raw carbohydrates, which is their source of energy.
Sublimation( solid---gas) is extremely rare because the particular solid needs to exert a high amount of vapor pressure to the extent that it is greater than atmospheric pressure.
There are so many examples for that in different areas, like biology experiment carried out in our lab recently.
Here's one link : https://www.creative-biogene.com/Services/Biosimilar-Cell-Line-Development.html
The answer is true. These are all signs of communication.
