algae

They come out only at night to feed on sponges and algae.

These unassignable animals include a large swimming predator called Anomalocaris and a soft-bodied animal called Wiwaxia, which ate detritus or algae.

The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae.

The algae capture the sun's energy by photosynthesis and store it in organic molecules.

Then fish eats the algae or eat other fish that have eaten those plants.

In a normal water phase, rivers eventually empty into oceans, and once in the oceans, the Phosphorus gets absorbed by water plants like algae.

Almost universally, biologists accept the idea that all eukaryotes (a category that includes most organisms except bacteria and certain algae) have internal clocks.

Eh… Like pebbles, fossilized algae?

Ancient fresh water green algae must have evolved features that enable them to withstand extremes of temperature and periods of dryness.

If so, the green algae would have been subjected to environmental pressures that resulted in adaptations that enhanced their potential to give rise to land-dwelling or organisms.

Today green algae live mainly in freshwater, suggesting that their early evolutionary history may have occurred in freshwater habitats.

Again, the good storage and cell wall molecules of red and brown algae are different.

Green algae store food as starch, as do land plants and have cell walls made of cellulose, similar in composition to those of land plants.

This would not be true of red and brown algae.

In addition, other lines of evidence support the hypothesis that land plants evolved from ancestral green algae used the same type of chlorophyll and accessory pigments in photosynthesis as do land plants.

This supposition stems from the close phylogenetic (natural evolutionary) relationship between the two groups. DNA comparisons have shown that green algae are plants’ closest living relatives.

Of today’s different groups of algae, green algae are probably the most similar to ancestral plants.

Since the disappearance of sea urchins from the waters up the coast of South Florida, many coral reefs there have been smothered by the uncontrolled growth of algae.

They eat algae and prevent it from overwhelming the coral.

In contrast to other productivity in the ocean, which is confined to various species of algae and bacteria dependent on nutrient concentrations in the water column, seagrasses are rooted plants that absorb nutrients from the sediment or substrate.

These small fishes use their gill filaments to strain out the algae that dominate such areas.

These filter-feeders thrive in the well-illuminated surface waters because oceans have so many very small organisms, from bacteria to large algae to larval crustaceans.

However, in addition to corals there are enormous quantities of algae, some calcareous, which help to build the reefs.

They're actually kind of combination of some sort of fungus and some sort of algae that live together in a symbiotic relationship.

Well, apparently petroleum is usually made from simple, one-celled marine animals and plants, algae, for example.

And the excess nitrogen once trapped by these cover crops either washed away in the next big rain or went down into the groundwater and either way eventually ended up in the streams and the bay, and that as we said means more algae in the water and less oxygen for the fish and other aquatic life to breathe.

And there they stimulate the explosive growth of algae and that uses up much of the oxygen in the water, oxygen that fish and other aquatic organisms need to stay alive.