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Algae like any plant, needs light to photosynthesise and grow.

Internal transportation? Some of the larger kelps have translocation (transport of photosynthetic products) but most do not. They have no need for water-conducting tissues as they are, at leaset at some stage, surrounded by water. There are no seeds. Spores may be motile or non-motile, and this varies from phylum to phylum, e.g., the red and blue-green algae are non-flagellated and are essentially non-motile.

The rate of photosynthesis was recorded at a range of light Intensities and conditions.

The definition of photosynthesis is the process through which plants use water and carbon dioxide to create their food, grow and release excess oxygen into the air.

Photosynthesis | Definition of Photosynthesis by …

The process of photosynthesis provides plants with the food and energy they need to grow.

This corresponds to the stomata opening at dawn, as the tree begins
photosynthesis, creating a suction which draws the xylem vessels in, narrowing them slightly and this narrowing is
greatest when transpiration is greatest at around midday.

I thought this because as the light intensity is becoming higher and
higher, I expected something to take over as the limiting factor (the
factor in the shortest supply, such as temperature or carbon dioxide
concentration), and prevent the plant from photosynthesising any

Chemistry for Biologists: Photosynthesis

The mesophyll (especially the palisade mesophyll) are the site of photosynthesis and contain

variables, or factors that must be kept the same are as follows: -

* The carbon dioxide concentration must be kept the same, because
the more CO2 that is in the air, or water, then the more that can
diffuse into the leaf, and if the plant had more CO2 then it would
be able to photosynthesise faster.

Chlorophyll does not
absorb green or yellow light effectively, but tends to reflect
them, decreasing the amount of light absorbed and the rate of

The rate of photosynthesis was measured at 4 other light intensities of 80, 350, 150, 60 and 0-μmol photons m-2 s-1.
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Photosynthesis Practical :: Papers

Plant (and algal) cells arose when photosynthetic prokaryotic cells were incorporated into one line of the respiring cell. The result, given the same proviso, is that the three – way symbiosis could now fix its own carbon using light energy, and respire.

The Spekboom Foundation of South Africa

It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .

Spekboom has enormous carbon-storing capabilities

More than 4 billion years ago, it is argued, primitive cells had one of at least three modes of , they could invaginate food particles, photosynthesise or absorb free floating organic nutrients in their environment. The theory argues that cells able to respire aerobically were incorporated into cells that invaginate their food. The resultant symbiosis had the capacity to respire. Maintenance of the symbiosis required the two cell types to reproduce at about the same rate, and that one not digest the other.

Photosynthesis dictionary definition | photosynthesis …

We use the term "algae" very loosely, simply because coralling them is so very difficult. As conceived in the broadest sense, algae are oxygen-generating, photosynthetic organisms other than embryophyte land plants, fungi and lichens. Quite simply, what we call "algae" is an artificial and highly heterogeneous aggregation of organisms belonging to many different evolutionary lineages, and therefore highly diverse from a genetic point of view. This genetic diversity is reflected in the enormous biodiversity exhibited by algae in terms of morphological, ultrastructural, ecological, biochemical, and physiological traits.

Marine macroalgae, or seaweeds, are plant-like organisms that generally live
attached to rock or other hard substrata in coastal areas. They belong to three
different groups, empirically distinguished since the mid-nineteenth century by the Irish botanist William Henry Harvey (1811-1866) on the basis of thallus color: red algae (phylum Rhodophyta), brown algae (phylum Ochrophyta, class Phaeophyceae), and green algae (phylum Chlorophyta, classes Bryopsidophyceae, Chlorophyceae, Dasycladophyceae, Prasinophyceae, and Ulvophyceae). Distinguishing these three groups, however, involves more substantial differences than indicated by this simple designation. In addition to the pigmentation, they differ considerably in many ultrastructural and biochemical features including photosynthetic pigments, storage compounds, composition of cell walls, presence/absence of flagella, ultrastructure of mitosis, connections between adjacent cells, and the fine structure of the chloroplasts. In general, we can say that they are simple organisms composed of one cell, or grouped together in colonies, or as organisms with many cells, sometimes collaborating together as simple tissues.

Photosynthesis - definition of photosynthesis by The …

Algae of other groups usually have two flagella (singular: flagellum). Reproduction may be isogamous, anisogamous, or oogamous. Female gametangia are not enclosed by a wall of sterile cells as in higher cryptogams. Mostly autotrophic (photosynthetic), pigments very variable and are the basis of classification; all have chlorophyll a; some have b, others c; all have accessory pigments of some kind e.g. phycocyanin (blueish), phycoerythrin (reddish), carotenes (yellow-brown), xanthophylls (brown, notably fucoxanthin found in brown algae).

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