Biology quiz | Biology homework help
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1 of 25
An example of a community is
| one giant individual kelp. |
| a kelp forest plus all of the physical factors affecting it. |
| all physical factors affecting a kelp forest. |
| a kelp forest plus all organisms living in it. |
| several giant kelp individuals living in one particular area. |
Question 2 of 25 Competitive exclusion can be best defined as
| when one species overcompetes and eliminates another. |
| the creation of a separate ecological niche by a new species. |
| the division of resources. |
| when one species shares limiting resources with another. |
| when competition results in the elimination of particular limiting resources. |
Question 3 of 25 The ecological niche of a species refers to which of the following?
| Habitat |
| Position of the organism in the food web |
| Role in the community |
| Mode of reproduction and food habits |
| Behavior in relation to other species in the community |
Question 4 of 25 Zooxanthellae live within the tissues of corals, and both organisms benefit from the association. This is known as
| mutualism. |
| predation. |
| commensalism. |
| parasitism. |
| facultative symbiosis. |
Question 5 of 25 Which of the following best describes cleaning symbiosis?
| Both partners are not harmed. |
| Both are harmed if one closely studies their association. |
| Both have coevolved into a close association |
| One is harmed while the other is not. |
| One species benefits while the other is unaffected. |
Question 6 of 25 The difference between food webs and food chains is that food webs
| consist of only one trophic level. |
| include primary producers as well as consumers. |
| do not take into account predators. |
| only outline feeding relationships among consumers. |
| are more complex. |
Question 7 of 25 The next level in a food web beyond the producers would be the
| top predators. |
| secondary consumers. |
| carnivores. |
| primary consumers. |
| decomposers. |
Question 8 of 25 Which of the following could be a tertiary consumer?
| Seaweed |
| Grazer |
| Carnivore |
| Autotroph |
| Herbivore |
Question 9 of 25 On average, what percentage of energy in a particular trophic level is passed on to the next trophic level?
Question 10 of 25 Detritus in the water includes
| dead organic matter. |
| waste products dissolved in water. |
| plankton. |
| smallest plankton-feeding fishes. |
| smallest algae. |
Question 11 of 25 A fundamental role of decomposers is
| releasing nutrients to be used by autotrophs. |
| causing diseases. |
| providing food for carnivores. |
| releasing oxygen. |
| providing energy for autotrophs. |
Question 12 of 25 Net primary productivity is best defined as the
| total amount of biomass created by producers. |
| total amount of biomass created by producers after energy loss to metabolism is factored. |
| total biomass of producers in the water in a given habitat. |
| total biomass of producers in the ocean. |
| None of the above. |
Question 13 of 25 The amount of chlorophyll in the water is a direct estimate of
| primary production. |
| respiration. |
| standing stock of phytoplankton. |
| oxygen utilization. |
| release of nutrients. |
Question 14 of 25 In the carbon cycle, seaweeds and plants play a fundamental role by
| increasing the amount of dissolved carbon dioxide as a result of decomposition. |
| decreasing the amount of dissolved carbon dioxide as a result of respiration. |
| increasing the amount of dissolved carbon dioxide as a result of photosynthesis. |
| decreasing the amount of detritus. |
| both increasing the amount of dissolved carbon dioxide as a result of respiration, and decreasing it as a result of photosynthesis. |
Question 15 of 25 Nitrogen fixation is performed at sea by
| seaweeds. |
| cyanobacteria. |
| phytoplankton. |
| zooplankton. |
| All of the above choices are correct. |
Question 16 of 25 Which of the following is an example of intraspecific competition?
| Two species of barnacles competing for space on a rocky shoreline |
| Two species of dolphins feeding on the same population of fish |
| Two individuals in a population of clownfish attempting to use the same anemone as habitat |
| Two species of fish attempting to use the same rocky ledge as habitat |
| Two species of seals fighting over space on a beach to rear their young |
Question 17 of 25 A population’s carrying capacity is
| affected by the growth rate of the population. |
| the number of individuals a habitat can support with available resources. |
| a constant that has been predetermined for all habitats. |
| the number of individuals in a habitat. |
| determined by comparing birth rate and death rate in a population. |
Question 18 of 25 In competitive exclusion, which of the following is true?
| Two species cannot coexist in a habitat. |
| One species is a better competitor for resources. |
| It leads to intraspecific competition. |
| It results from intraspecific completion. |
| It leads to population growth for both competitors. |
Question 19 of 25 In a salt marsh, a fish eats decaying material from around the base of Spartina grass plants. A snail scrapes algae from the stalks of the Spartinagrass. These species can coexist because they have which of the following?
| The same niche, but different habitat |
| The same habitat and the same niche |
| The same habitat, but different niche |
| Different habitats and different niches |
| None of the above |
Question 20 of 25 Which of the following gasses is NOT considered to be a major greenhouse gas?
| Methane |
| Oxygen |
| Carbon dioxide |
| Water vapor |
| Nitrous oxide |
Question 21 of 25 The increase in atmospheric carbon dioxide is a direct result of ___________________.
| too many marine animals dying |
| rising sea levels along the coast |
| human activities |
| predation on coral reefs |
| overfishing |
Question 22 of 25 Significant consequences of global warming include_____________.
| rising sea levels |
| plants flowering sooner in the year |
| penguins moving closer to the South Pole |
| an increase in coral bleaching |
| All of the above |
Question 23 of 25 Which of the following is a direct chemical consequence of rising carbon dioxide levels in oceans?
| There will be more water. |
| More phytoplankton will be found near shorelines. |
| Populations of large mammals will increase. |
| Acidification of the oceans. |
| Coral reefs will flourish. |
Question 24 of 25 Which of the following is NOT likely to happen as global warming continues?
| More water vapor will enter the atmosphere. |
| Sea levels will fall exposing more coral reefs. |
| The Great Ocean Conveyor circulation will be disrupted. |
| Greenland could melt. |
| Methane could be released from ocean sediments. |
Question 25 of 25 Excessive algae growth as a result of increased nitrogen in water is referred to as _________________.
| Eutrophication |
| Nitrogen fixation |
| Acidification |
| Nitrification |
| Mineralization |
