Algae seeds, also known as algae spores or cultures, can be obtained from specialized suppliers that cater to the aquaculture or research industries. These suppliers typically offer a variety of algae strains for purchase. You can also try contacting universities, research institutions, or government agencies that work with algae for potential sources of algae seeds. Additionally, some hobbyist or aquarist communities may have resources or contacts for obtaining algae seeds for smaller-scale projects. **

Algae are primarily C3 plants, meaning they use the C3 carbon fixation pathway to convert carbon dioxide into organic compounds during photosynthesis. Some algae species, such as certain types of green algae, have been found to use a C4-like carbon concentrating mechanism under certain conditions, but they are not considered true C4 plants. Overall, the majority of algae species are classified as C3 plants. **

Algae can grow on a variety of plants, including aquatic plants such as seaweed and kelp, as well as on the surfaces of trees, rocks, and soil. Algae can also grow on the surfaces of man-made structures such as buildings, sidewalks, and bridges. In aquatic environments, algae can attach to the surfaces of plants and form symbiotic relationships with them. Overall, algae can be found growing on a wide range of plant species in both aquatic and terrestrial environments. **

Black algae on aquarium plants are a type of algae that appear as dark patches or spots on the leaves of the plants. They are caused by an overgrowth of a specific type of algae called black brush algae. These algae are often difficult to remove and can quickly spread if not addressed promptly. Black algae thrive in low light conditions and can be a sign of poor water quality or lack of maintenance in the aquarium. **

Ground cover plants can get algae because they provide a moist and shaded environment that is conducive to algae growth. The dense foliage of ground cover plants can create a microclimate that retains moisture and limits air circulation, creating the perfect conditions for algae to thrive. Additionally, the decaying organic matter and debris that accumulate in the dense foliage can also provide nutrients for algae growth. These factors combined make ground cover plants susceptible to algae infestations. **

Green algae threads in aquarium plants are thin, green strands of algae that can attach themselves to the leaves and stems of aquatic plants. They are a common type of algae that can be found in aquariums, and they can be a nuisance for aquarium hobbyists as they can detract from the appearance of the plants. Green algae threads can be controlled through regular maintenance and proper water parameters, such as adequate lighting and nutrient levels. **

Algae are a diverse group of photosynthetic organisms that can be found in various aquatic environments such as oceans, lakes, and rivers. They can range in size from microscopic single-celled organisms to large multicellular seaweeds. Algae play a crucial role in the ecosystem as they are primary producers, converting sunlight into energy through photosynthesis. Additionally, algae are an important food source for many aquatic organisms and are also used by humans in various industries such as food, pharmaceuticals, and biofuels. **

No, algae are not prokaryotes. Algae are a diverse group of photosynthetic organisms that can be found in various environments, including freshwater and marine habitats. They are eukaryotic organisms, meaning they have a true nucleus and other membrane-bound organelles within their cells. This distinguishes them from prokaryotes, which lack a true nucleus and membrane-bound organelles. **