After the cooling period, the environmental conditions of Laga began to stabilize making possible the development of life. The condensation of the atmospheric water formed the ocean and all the water bodies existing in Laga. The timeline shows the developmental phases of life.

 

 The aquatic life on Laga originated from a primordial cell containing phycobilin, a pigment that traps blue-green light, as the dominant pigment. This cell was a descendant of the primeval cell ß-Prima cell. These blue-green algae type cells clumped together on the rocky, warm, deep water of the oceans. The dominant color of these cells was not green due to lack of chlorophyll. On the other hand, by this time the oxygen was liberated primarily by the dissociation of atmospheric water vapor through the action of ultraviolet radiation, which was incorporated into the atmosphere in an ozone layer. The lack of oxygen confirmed the absence of photosynthetic processes. The low content of oxygen in the water forced these single-celled organims to survive by metabolising nutrients by photodissociation of molecules. After several million years, these cells began to evolve into the primordial photosynthetic cells. The supply of nitrogen, magnesium, and calcilum were adequate to provide the necessary nutrients the plants needed to survive. Another factor that contributed to the development of aquatic life was the high content of phosphorus in the bottom of the ocean, which provided the pH buffer for the acidity of the primeval volcanic activities. With the beginning of photosynthesis by the rhodocells oxygen molecules were released into the atmosphere and steadily worked to strengthen the ozone layer and change Laga's chemically reducing atmosphere into a chemically oxidizing one. The complete plant predecessor cell was the chloroulva cell which possessed fully developed chloroplasts and were able to process sunlight. The harnessing of sunlight was accomplished by the cells clustering on the rocks of the shallow waters.

Consequently, from this splitting of cells we have two different types of plants developed in the waters of Laga. The descendant of the rhodophycobilin cell gave way to a kind of red algae plant called Rastrera Algae. Rastrera is a deep blue-reddish edible seaweed that can be found in deep waters up to 200 meters. The other kind of plants from the chloroulva cell were plants that dwell in the shallow oceanic water and in the marshes and lakes of Laga.

MARINE ALGAE DEVELOPMENT

PRIMORDIAL RHODOCELL

A eukaryote cell able to photosynthetise red light from the sun. Floated freely in the waters of Laga's ocean

CLUSTERING PROCESS

The single-celled rhodocells began to cluster together forming colonies of microorganisms. Still floating but getting closer to the rocky floor in the tidal area of the ocean.

ROCK-ATTACHING PROCESS

Colonies of rhodocells began to cling to rocks in the bottom of the ocean and slowly began to migrate to shallower waters. Development of stalks that anchored the colonies to rocks.

 

LEAVES FORMING PROCESS

Colonies of rhodocells began to develop feather-like leaves. Primordial plants began to stabilize to a depth of 200 meters. After some time chloroplastids in the rhodocells began to synthetise chlorophyll, and new types of cell began to develop.

RASTRERA ALGAE

Rastrea algae is deep-waters algae. It is not always blue-red, but there are yellowish and brown varieties. The structure of this algae is similar to the edible Dulse seaweed found on Earth's oceans. The reproduction is mainly asexual.

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SHALLOW WATERS PLANTS

CHLOROULVA CELL

Primordial photosynthetic cell. Full eukaryote whose chloroplastids contains chlorophyll, which allows cell to photosynthetise using visible light from the sun Kadesh.

CLUSTERING PROCESS

Similar to the clustering of rhodocell, chloroulva began to clump together and to develop a primitive form of hair-like stalks that allowed them to cling to rocks.

LEAVES FORMING PROCESS

In the shallow tidal area of the ocean the colonies of chloroulva began to develop tough holdfasts able to resist the tidal variation of the coast. Leaves began to develop upward in search of visible light.

CALENDULA FLOTUS

Chlorphyta type plant abundant in shallow fresh waters, but also developed in the moist soils of the tropical coast. Spores are produced by the leaves and gave rise to "male" and "female" gametophytes which allowed sexual reproduction.

TROMPETIS GYRUS

The seaweed of Laga. The hollow centers of the stems allow cells to access the water. The opening of the leaves of some species closed and provided an air bladder that allowed the "Trompetis" to buoy themselves closer to the surface of the waters

LAMINARIA CURDELA

Although is not brown in color due to the predominance of chlorophyll in the chloroplasts of the cells, "Laminaria" is a type of fingered kelp that adapted to the freezing waters of the north hemisphere of Laga. It can grow up to 1.2 to 1.5 meters high. Reproduction is primarily sexual with differentiated gametophytes.

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Page prepared by Silvia Tinajero | Yia-Hui-Shu (Ada) | Daniel Gabellini