plankton. n. 1. (Biology) the organisms inhabiting the surface layer of a sea or lake, consisting of small drifting plants and animals, such as diatoms.Compare nekton. [C19: via German from Greek planktos wandering, from plazesthai to roam].lankton is a primary food source for many animals, and consists of bacteria, protozoans, certain algae, cnidarians, tiny crustaceans such as copepods, and many other organisms. Microscopic aquatic organisms that float near the surface of water.
Descriptions of Common Tomato Diseases. 1  Anthracnose - small, circular, slightly sunken spots... 2  Bacterial Canker - wilting, browning plants and bird's-eye fruit spots. 3  Bacterial Spot - small, dark, slightly raised dots on fruit... 4  Bacteria Wilt - entire plant dies rapidly after browning... 5  Blossom End Rot - spot on bottom of fruit turns black and...
Different tomato plants obviously produce different types of tomatoes. To help clear up any confusion, we have addressed several major categories of the tomato.Beefsteak Tomato Plants-Commonly known as the large-fruited types, beefsteak tomato plants are capable of producing a slice that covers a sandwich.aste Tomato Plants-Less juicy than most varieties of tomatoes, the paste tomato plant offers a pear shaped fruit without a center core. Paste tomatoes are known for their meaty insides and very few seeds, making this tomato plant an ideal canned good. San Marzano-The ultimate tomato for making pasta sauce.