Algae (/ ˈældʒiː / ⓘ AL-jee, [3] UK also / ˈælɡiː / AL-ghee; sg.: alga / ˈælɡə / ⓘ) are any of a large and diverse group of photosynthetic organisms. It excludes the land plants (embryophytes). Such …

Apr 17, 2026 · Algae are defined as a group of predominantly aquatic, photosynthetic, and nucleus-bearing organisms that lack the true roots, stems, leaves, and specialized multicellular reproductive …

Sep 11, 2024 · Learn about algae in biology. Get examples and discover their definition, classification, characteristics, and importance.

Aug 9, 2025 · Algae are a group of autotrophic, non-vascular thalloid plants with unicellular or multicellular, non-jacketed sex organs without any formation of an embryo.

Mar 9, 2026 · Algae are classified as eukaryotic, photosynthetic organisms in the kingdom Protista, separate from true plants. That single-kingdom label, though, undersells how diverse algae really …

Jun 4, 2016 · Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis. Certain algae are familiar to most people; for instance, seaweeds (such as kelp or …

Jan 15, 2025 · Algae are versatile photosynthetic organisms, with remarkable adaptability and metabolic properties that allow them to live in diverse and extreme habitats, as well as holding great potential …

May 9, 2025 · Many types of algae are found in marine and freshwater habitats, ranging in size from tiny nanoplankton to the giant kelp.

Algae are a diverse group of plant-like organisms, with over 70,000 different species that can be found around the globe. These aquatic organisms use photosynthesis to create food from sunlight, like …

Jan 9, 2024 · Harmful algal blooms are the rapid growth of algae or cyanobacteria in water that can harm people, animals, or the environment. Going in or near water with a harmful algal bloom can …