Medical definition of posterior median sulcus: a shallow groove along the midline of the posterior part of the spinal cord that separates the twoâ¦ a shallow groove along the midline of the posterior part of the spinal cord that separates the two posterior funiculi and is the externalâ¦
Zooplankton Fact Sheet. Zooplankton are microscopic invertebrate animals that swim or drift in water. They are at the base of the food chain, feeding on microscopic plants and being fed upon by aquatic insects, fish and salamanders.ooplankton Fact Sheet. Zooplankton are microscopic invertebrate animals that swim or drift in water. They are at the base of the food chain, feeding on microscopic plants and being fed upon by aquatic insects, fish and salamanders.
Difference. The most evident dissimilarity between them is that Zooplankton is an animal and protozoan while Phytoplankton is a plant. Diatoms and algae are the two classes of the latter one. Crustaceans, jellyfish, etc., are the forms of the former one.Phytoplankton is a tiny plant that is the source of oceanic food chain. They are small, but the strength they gain from the sun assists to support all the life in the ocean.ifference. The most evident dissimilarity between them is that Zooplankton is an animal and protozoan while Phytoplankton is a plant. Diatoms and algae are the two classes of the latter one. Crustaceans, jellyfish, etc., are the forms of the former one.