The green growth around the stagnant water is made up of ____________
Ans: pond scum n. Any of various freshwater algae that form a usually greenish film on the surface of stagnant water.
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Answer: The green growth around the stagnant water is made up of green algae also known as chlorophycae and fungi.
Explanation:Algae are everywhere, in oceans, in freshwater lakes and rivers, on land, and even in the air we breathe. Sometimes called
pond scum or seaweed, they are a natural part of any aquatic environment. Algae and fungi can live together in a form called lichens on rocks, walls, and trees.
Algae occur at the bottom of the food web, making them vital food sources for zooplankton (small invertebrates such as
Daphnia).In turn, these invertebrates are eaten by fish and other aquatic animals.
Similar to all living plants, algae need nutrients such as phosphorus and nitrogen—and light to photosynthesize and thrive.
Different kinds of algae have distinct appearances and growat different times of year. Indeed, color and season are helpful in identification. Algae come in many shapes and sizes, ranging from microscopic plants (most
algae fall into this category) to large ocean
kelps, which can grow to 20 feet or more.
They can consist of a single cell or colonial
globes orlarge ribbons or almost any other
plantshape imaginable.Inwater, algae can
be free-floating phytoplankton or periphy-
ton attached to substrates such as other
plants, rocks, logs, or sediments. Chara,
also called muskgrass, is widespread in
Minnesota lakes. It has the appearance of
a submerged rooted plant but is actually a
multicellular green alga. In lakes and rivers, different forms of algae grow in response to
changes in water temperature, sunlight,
and nutrients.
Some green algae such as Cladophora may grow extensively on rocks and some stagnant water and rivers.