unit 2 APES

when would the species richness of the ecosystem have been the lowest ?

1-4 years after the volcanic eruption

at which time after clear-cutting does the ecosystem exhibit the greatest species richness ?

100 years

which of the following was the number of finches in the population with a beak size of 10.2mm in 1978 ?

12

the pH at which 50% of the Daphina survive after 2 hours of exposure is closest to ..

4.5

on the basis of the data, the best prediction of the pH of water in which Daphina normally are found in the wild is ..

7

which of the following was the average beak size of finches on the island of Daphne Major in 1976 ?

9.5mm

Bull trout story: which of the following identifies the author's claim ?

Bull trout are unable to live in high sediment loaded waters and migrated to avoid the conditions introduced during dam construction

based on the data table, which ecosystem is in the earliest stages of succession ?

Ecosystem B

living organisms must acquire energy from their environment. examples of adaptations that help organisms acquire this energy include which of the following ?

I and II only

In which stage are most species present considered pioneer species ?

II

five islands, A, B, C, D, and E, differ only in distance from the mainland. which has the highest species diversity ?

Island B

which of the following best explains why each of the finch species on the Galapagos Islands evolved to be specialists ?

Islands have limited resources, forcing species to feed on a small range of food items

Gulf of mexico story: which of the following identifies the author's claim ?

The increased rainfall events in the US are decreasing the tolerance of fish and other marine species in the Gulf of Mexico because of a decreased concentration of oxygen

which of the following is a measure of the biodiversity of an ecosystem ?

The total number of different plant species

which of the following best shows the process of evolution ?

a population of mosquitoes develop resistance to pesticide

which of the following statements about levels of biodiversity is correct ?

a population with high genetic biodiversity is better able to respond to environmental stressors

which of the following would most likely experience the greatest decline of specialist species if an invasive species emigrated from the mainland ?

a small island in close proximity to the mainland

which of the following claims is best supported by the data in the graph ?

after the volcanic eruption, pioneer species colonized

which of the following illustrated the community with the highest biodiversity ?

all 10

organisms adapted to survive in water with the widest range of salinity would most likely be native species in which of the following marine environments ?

an estuary within a lagoon

which of the following is best supported by the data shown in the map above ?

animals migrate seasonally to mate and to find food in different habitats

which of the following explains how the scientists' calculation of average number of species would change with the inclusion of this new island in their study ?

average would decrease because fewer species would have migrated directly to the father island

which of the following best describes the role of moss in the transition to stage III ?

breaks down rock and adds organic nutrients to the soil

the consumption of mosquitoes by bats and the control of flooding provided by tropical forests in mountain areas of Central America are examples of ..

ecosystem services

which of the following best explains how environmental stressors, such as wildfires, can affect biodiversity in a n ecosystem ?

ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity

the most likely reason for the phenomenon is that native pollinators ..

have coevolved with native plant species

which of the following is most likely to be the direct result of lack of genetic diversity in a food crop such as corn ?

increased susceptibility on plant disease

how would including a control group be useful in the daphina experiment ?

it would provide a reference for the effects of random environmental factors

which of the following, if true, best supports the claim of the citizens' group ?

oak and hickory are late-successional species

Mussel graph: which of the following conclusions is best supported by the data in the graph ?

pisaster is a keystone species, when Nucella was removed the proportion of live mussels was similar to control

which of the following identifies the process that is illustrated in the diagram ?

primary succession, process in diagram begins with bare rock

which of the following correctly describes the disruption of an ecosystem service by an anthropogenic activity ?

provisioning services are disrupted by increased combustion of fossil fuels, which leads to an increase in air pollution

which of the following likely best describes why most of these species went extinct ?

rapid climate and habitat change

which of the following describes how ecologists could determine when this ecosystem is approaching a climax community ?

record the number and type of producers present every year after the eruption

which of the following would be categorized as a cultural ecosystem service of forest ?

recreation and scenic areas for tourism

which of the following is the best example of a keystone species ?

sea otter

which of the following describes why secondary succession generally occurs more quickly than primary succession ?

secondary succession takes place in areas that already have soil and nutrients in place

which of the following do small isolated islands have a greater rate of species extinction than larger, less isolated islands ?

small isolated islands have a lower availability of resources

which tree species grows best with full sunlight ?

sweet gum

which of the following best describes the frog species' range of tolerance to acidic conditions ?

the frogs can tolerate a pH between 4.5 and 6

which of the following would be the best to use as a control in this study ?

the health of the salmon population prior to any dam construction

which of the following statements correctly describes the trends seen in the data ?

the lowest sea level occurred during the Paleogene period

which of the following best describes how the moths adapted to the new environment over time ?

the moths adapted to the new environment by changes in the genetics of the population

163 small island found from 2000km mainland. a second lager 230,000km island is found 1000km from mainland. Which is true about small island compared to large island ?

the rate of immigration is lower for the small island than for the large island

which of the following can be estimated from the sample for the invertebrates in the pond ?

the species richness

which of the following statements explains the changes in size and composition of the population of finches after the drought ?

the total number of finches in the population decreased, and the smaller-beaked finches were more successful in the drier enviornment

which of the following hypotheses is the most likely explanation for their differences in data between the islands ?

the types of food found on the two islands exert selective pressure on beak size

which of the following is most likely the season that an island in the ocean that is 5km from a continent would have a higher number of species than one that is 15km from a continent ?

there are more species that have the ability to travel 5km than can travel 15km

small populations of animals, such as those typically found of islands, are prone to extinction because ..

they are more vulnerable to unpredictable events

Daphina magna story: which statement below is the most likely testable hypothesis based on the information provided ?

when the concentration of nanosilver particles in water is increased, the population of Daphina magna will decrease