Bio 100 Exam Questions With All Correct Answers A+ Pass

Bio 100 Exam Questions With All Correct Answers A+ Pass Which of the following is the most complete example of an ecosystem? - All of the organisms and components of their physical environment in and around the Stillwater River. - All the organisms that live in the shower stalls in the Rec. Center. - All the plants, animals, and decomposers that live on the UMaine Mall. - All of the plant and animal species that live in a small pond near campus. - Interactions between all the beaver in the Stillwater river between the two Orono dams. - Answers - - All of the organisms and components of their physical environment in and around the Stillwater River. When considering Biogeochemical cycles, the major reservoir for phosphate is... - clouds. - rocks on/near the earth's surface. - the atmosphere. - the earth's core. - the open ocean. - Answers - - rocks on/near the earth's surface. A single-celled organism lacking organelles and found in a "normal" pond on the UMaine campus is most likely a(n)... - Fungi. - Plant. - Bacteria. - Eukaryote. - Answers - - Bacteria. A population's carrying capacity in a given location... - can be changed if the area available also changes. - can increase if new resources are made available. - is unchanged if individuals leave the area. - All the above are correct. - Answers - - All the above are correct. Elephants have a major influence on community structure. The African grasslands contain scattered woody plants, but they are kept in check by the constant uprooting activities of the elephants. Take away the elephants, and the grasslands change back to forests. Elephants also create watering holes for all animals to drink from. Which of the following best describes why elephants are the keystone species in this setting? - Grazing animals depend upon huge numbers of elephants to convert forests to grassland. - Elephants create lodges that cause rivers to change into lakes. - A few elephants can modify and impact a very large area thus affecting the structure of the larger community. - Each elephant is larger in size than any other animal in this area, so they are the dominant species. - Elephants are the most abundant herbivore in this community and are thus dominant species. - Answers - - A few elephants can modify and impact a very large area thus affecting the structure of the larger community. This question is related to our in-class Ecosystem Activity. If all the individuals of the same population in a defined area are counted, this would be called its... carrying capacity. density. abundance. ecology. - Answers - abundance. How can you contact Dr. Dastoor? Go to their office in 319 Murray Hall. Send an email and ask for a meeting. Talk to them right after lecture is over. Look at the course syllabus and find their contact details. All the above are correct - Answers - All the above are correct Which of the following major nutrient cannot be used directly in the form it is found in its reservoir (it must first be converted before being biologically available)? Nitrogen Carbon Phosphate Water - Answers - Nitrogen The textbook used in BIO100 is called... "Biology" by OpenStax. "All About Life" by McMillan. "The Living Science" by Pearson. There is no assigned textbook "Basic Biology" by Cain and Freeman. - Answers - "Biology" by OpenStax. In some species-species interactions, both partners benefit from the interaction. What is this type of relationship called? - mimicry - camouflage - mutualism - competition - parasitism - Answers - - mutualism For most terrestrial ecosystems, pyramids composed of species abundances, biomass, and energy are similar in that they have a broad base and a narrow top. The primary reason for this pattern is that... - top carnivores are usually the keystone species. - as matter passes through ecosystems, some of it is lost to the environment. - because of laws of thermodynamics, energy is lost from the system each time it changes form. - biomagnification of toxic materials allows the secondary consumers and top carnivores to increase in number. - secondary consumers and top carnivores require less space than producers. - Answers - - as matter passes through ecosystems, some of it is lost to the environment. This question is related to our in-class Ecosystem Activity. The number of individuals in a population at a particular study site are affected by all the following factors, except... - predators. - competition for resources. - the number of individuals at your second, unconnected study site. - pollution levels. - Answers - - the number of individuals at your second, unconnected study site.