GEOLOGY

Detailed explanation-1: -The cladoceran Daphnia (water flea, named after the Greek virgin nymph, Daphne, who also thrived without males) is distributed globally and is the keystone zooplankton species in both lakes and reservoirs.

Detailed explanation-2: -Phytoplankton are the tiny, plant-like producers of the plankton community. They include bacteria and algae that form the base of aquatic food webs. Common phytoplankton include diatoms, dinoflagellates, cyanobacteria (blue-green algae), and green algae.

Detailed explanation-3: -Phytoplankton are microscopic marine algae. Phytoplankton, also known as microalgae, are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow. Most phytoplankton are buoyant and float in the upper part of the ocean, where sunlight penetrates the water.

Detailed explanation-4: -Diatoms. These consist of single cells enclosed in silica (glass) cases. Dinoflagellates. This name refers to two whip-like attachments (flagella) used for forward movement. Desmids. These freshwater photosynthesisers are closely related to green seaweeds. 12-Jun-2006