Zooplankton are small, free-floating aquatic microorganisms including crustaceans, rotifers, open water insect larvae and aquatic mites. The zooplankton community is composed of both primary consumers, which eat free-floating algae, and secondary consumers, which feed on other zooplankton.

Zooplankton are animal plankton that are generally larger sized than phytoplankton. These animals are consumers because they must eat preformed organic compounds to survive.

They are single-celled organisms that conduct photosynthesis. They are thus autotrophs that make their own food from sunlight, nutrients, and carbon dioxide. Zooplankton include single-celled protists (that are sometimes referred to as microzooplankton).

Jellyfish are the largest example of holoplankton. They remain in the planktonic zone for life and can grow as large as 8 feet, with tentacles up to 200 feet.

Jellyfish are a type of zooplankton that both drift in the ocean and have some swimming ability. Hundreds of jellyfish species live in every part of the ocean and belong to the same animal group as corals and sea anemones.

What are zooplankton? Zooplankton are organisms that have animal-like traits. The biggest are only five millimetres long and the smallest are just one thousandth of this size. They float, drift or weakly swim in the water.

Advantages. Multicellularity allows an organism to exceed the size limits normally imposed by diffusion: single cells with increased size have a decreased surface-to-volume ratio and have difficulty absorbing sufficient nutrients and transporting them throughout the cell.

How does Volvox compare to plants, animals, and other multicellular organisms with respect to the sorts of processes it has evolved? In a way, Volvox exhibits a relatively streamlined type of multicellularity. It possesses just two cell types, and these cells are not organized into tissues or organs.

Volvox (Protists) Movies. Straddling the plant and animal kingdoms, the protist Volvox forms stunning bright green colonial balls in water bodies that are enriched in nitrates. Found in puddles, ditches, shallow ponds and bogs, Volvox colonies reach up to 50,000 cells and may include daughter and granddaughter colonies …

Volvox and its relatives live in freshwater ponds all over the world. Some of the species are unicellular, while others live in colonies of up to 50,000 cells. Many of the colonial algae species are visible to the eye and appear to be little green spheres rolling through the water.

flagella

chlorophyte green algae