biology Micro organism test 21 Welcome to your biology Micro organism test 21 Name Email 1.Tooth decay is caused by _____. (a) viruses (b) bacteria (c) fungi (d) protozoa None 2.Cuscuta is an example of: (a) autotroph (b) saprotroph (c) host (d) parasite None 3.Melatonin encodes proteins in cells to prevent ______ entry. (a) bacterium (b) protozoan (c) fungus (d) virus None 4.Which of the following popular kitchen ingredients is called the 'sugar eating fungus'? (a) Vinegar (b) Baking powder (c) Yeast (d) Ketchup None 5.Which of the following is also called ‘green algae’? (a) Phaeophyceae (b) Chlorophyceae (c) Rhodophyceae (d) Porphyridium None 6.Organisms such as bacteria, viruses, fungi, protozoans, helminths, etc., that cause diseases in humans are called ______. (a) frugivores (b) predators (c) pathogens (d) antigens None 7.Which of the following is NOT unicellular? (a) Amoeba (b) Spirogyra (c) Plasmodium (d) Paramecium None 8.Which of the following is a group of bacteria found in human intestines, whose presence in water indicates contamination by disease-causing microorganisms? (a) Streptococcus (b) Pseudomonas (c) Clostridium (d) Coliform None 9.Which symbiotic bacteria are responsible for determining nitrogen? (a) Rhizobium (b) Pseudomonas (c) Lactobacillus (d) Azotobacter None Time's up
