In the long run algae does.
Algae can cover any surface; walls, rocks, etc, as long as it is under water.
Algae can grow back in as soon as 5 hrs.
The fresh water green algae (charales), can reach up to 120 cm long. Hope that helps.
Spirogyra is a type of colonial green algae. They are unicellular and arrange themselves in long filaments.
Ordinary ground water? A few days can see the algae form.
Wait long enough and it will find you
filaments
1100 million years ago
Red algae reproduces through asexual reproduction into a number of single-celled stages called spores.
Coralline algae is classed as a red algae. Red algae is unique because it has adapted to be able to photosynthesise not only in light (producing O2) but also in darkness and at night (producing CO2). This means that coralline algae can still thrive in low light, as long as the water has a high enough oxygen content.
Can be both. There are plenty of unicellular algae, such as Euglena, but most plants you see underwater are algae too (as long as they don't have flowers; a water lily is not an alga), and these are obviously multicellular. :P Oh, by the way, the singular is alga. One alga, two algae. ^^