n- 1 :Why is amoeba an irregular organism ?Answer- 1 :Amoeba do not consist of cell walls which allows them to MOVE freely. They contain specialized structures called pseudopodia which are bulges of the cytoplasm, GIVING amoeba its irregular shape. Amoeba can move and feed by means of these pseudopodia.----------------------------------------------------------------------------------------------Question- 2 :What is contractile vacuole ?Answer- 2 :A contractile vacuole is a specialized type of vacuole in eukaryotic cells, particularly protozoa and certain unicellular algae. It is involved in osmoregulation. The contractile vacuole contracts to expel water out of the cell.----------------------------------------------------------------------------------------------Question. 3 :State the functions in Amoeba ?Answer. 3 :Amoeba is a unicellular organism. A contractile vacuole works just the same as the name suggests, in that it expands and contracts. The FUNCTION of the contractile vacuole is to pump water out of the cell through a process called osmoregulation, the regulation of osmotic pressure.----------------------------------------------------------------------------------------------The uses of Fungi are:Fungi are an important source of food.  Yeast, a unicellular fungus ,is important in bakeries as it is used in the MAKING of bread.  Yeast also produces vitamin B. Fungi, like bacteria ,are also good decomposers.  Penicillin an important antibiotic is obtained from a fungus called ----------------------------------------------------------------------------------------------The uses of bacteria:Food processing. Biotechnology. Genetic engineering. Fiber retting. Pest control.----------------------------------------------------------------------------------------------Hope the answer helped you.Please mark me as brainliest as it take me a lot of time to write...Thanks!!!----------------------------------------------------------------------------------------------