MIC 102unit 5-2 Exam Questions with Correct Answers

MIC 102unit 5-2 Exam Questions with Correct Answers The stable association of one organism with another is called - Answer-Blank 1: symbiosis or symbiotic Historically, the smaller organism in a symbiotic relationship was termed the symbiont and the larger organism the host. Currently, these two organisms are now regarded as _____. - Answer-partners A symbiotic relationship in which each partner receives some benefit, but each partner can also live independently is called _____. - Answer-cooperation Mutualistic relationships between microbes and insects are common because insects _____. - Answer-often consume diets lacking essential nutrients Aphids and Buchnera aphidicola bacteria are obligate mutualistic symbionts. Therefore, if the bacterial partner is separated from the insect and placed in a culture medium, the expected result would be that the bacteria would ____. - Answer-die The general term used to describe two organisms living together, regardless of the outcome, is ____. - Answer-symbiosis Aggregations of many types of organisms in stable relationships are now often referred to as _____. [Choose two.] - Answer-a holobiont a metaorganism Identify the common characteristic of cooperation and mutualism. - Answer-Both are symbiotic relationships In mutualistic associations between microbes and insects, the microbe generally receives _____. - Answer-secure habitat and ample nutrients If an aphid is treated with an antibiotic, it dies. Which is the best explanation for this observation? - Answer-Aphids harbor obligate mutualistic bacteria. Which of these observations that support the idea that endosymbiotic relationships between aphids and bacteria are evolutionarily old? - Answer-Over 90% of the genes are common among the various endosymbionts. Certain steps in amino acid synthetic pathways occur in only the aphid or the endosymbiont. Mutualistic relationships between microbes and insects are common because insects _____. - Answer-True