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.