Bio 1300 Exam Questions with All Correct Answers

Bio 1300 Exam Questions with All Correct Answers Match the following descriptions with the type of organism involved. A. Predators B. Herbivores C. Parasites D. Parasitoids - Answer- A. Predators Short but lethal interactions with prey B. Herbivores Short and nonlethal interactions with prey C. Parasites Extended but nonlethal interactions with prey D. Parasitoids Extended and lethal interactions with prey You are assigned a research project on a parasitic species. You choose the sea lamprey (Petromyzon marinus), You discover that juvenile sea lampreys attach themselves to the outside of fish and 'rasp' away the scales and skin in order to obtain nutrition from the fish's bodily fluids. You are suprised to find out that sea lampreys can feed on more than ten different fish species from several families. You also learn that adult lampreys die after spawning while eggs hatch into a nonparasitic larvae that inhabit small sand burrows in stream beds. Based on all these findings, what terms would you use in your research report to describe the sea lamprey? Select all that apply. - Answer- polyphagous ectoparasitic macroparasitic Long-term data are valuable in assessing the health and stability of a community. Conservation biologists look for changes in a community over time to alert them to the fact that something is wrong with the community and that potential threats need to be assessed. Of particular importance to understanding community stability is the change in the ______. - Answer- number of species and their relative abundances in the community over multiple years Place each of the following into the appropriate category of competition. - Answer- Interspecific - interference competition: An eastern bluebird and a European starling compete for nest cavities by physical confrontations, if given the opportunity, a bald eagle will steal a fish that an osprey has caught rather than catching a fish itself. Interspecific - exploitation competition: White-tailed deer browse the understory of a deciduous forest, eating the vegetation that numerous other species depend on, paramecium caudatum and P. bursaria both show a drop in population densities when housed together. Intraspecific - exploitation competition: In late fall, American red squirrels scurry around the base of a white oak collecting as many acorns as possible for their individual winter food caches. Intraspecific - interference competition: During the breeding season, male elephant seals engage in vicious battles for control of a harem of females. A species interaction in which one species benefits but the other species is unharmed is called - Answer- commensalism. According to the competitive exclusion hypothesis, - Answer- two species with the same niche cannot coexist.