ecology

How do the designs of Experiments 1 and 2 differ in terms of sampling procedure

Experiment 2, chlorophyll level was tested in addition to phosphates and nitrates, while in Experiments 1, it was not

How do Lichens contribute to primary succession?

Lichens begin to break down rock to form soil

Which is an advantage of a habitat corridor?

Members of species can move safely from one area to another

Which is an example of the direct economic value of biodiversity?

Plants provide food and medicine for humans.

which strategy would be the best at slowing human population growth

access to education

Between 1880 and 1930 human population doubled due to

all of the above

Which of the following are ways in which species lose their habitats?

all the above

exponential growth occurs in the population of a species of predator, the population of its prey will most likely

decrease quickly

As human population increases exponentially, biodiversity

decreases

The number of wild horses per square kilometer in a prairie is the horse populations

density

This term is used to describe countries with higher than average income, slower population growth and diverse industrial economies.

developed

In Figure 4-1 above, the first age structure graph for country X shows the percent of the population in each age group for the year 2000. The remaining three graphs are projections of how the age structure of country X will change. Referring to Figure 4-1, what can you conclude about the stage of population growth country X is in now?

developing nation

What causes edge effects?

fragmentation of habitat

According to the graph, which human-caused disaster requires the greatest recovery time?

groundwater explosions

an increase in population growth (blank) the need for natural resources

increases

Given the results of Experiments 1 and 2, all of the following would reduce the levels of phosphates and nitrates, and therefore the rate of eutrophication, of the lake EXCEPT

increasing the number of farms on the lake.

What is the factor that most influences Life Expectancy?

infant mortality

Which group of organisms has the highest biodiversity?

insects

Which of the following is a producer that breaks down rock?

lichen

What type of vegetation would you expect to find on newly formed volcanic islands?

lichens

According to the graph, which natural disaster requires the least amount of recovery time

lightning strike

Which resource is the one that determines carrying capacity for a population?

limiting resource

water food shelter are all examples of

limiting resources

an example of population would be all

red maple trees in a forest

If over a long period of time, each pair of adults in a population had only two offspring and the offspring lived to reproduce, the population would

remain the same

What is a pattern of change that occurs on a surface where an ecosystem has previously existed?

secondary succession

Examine the graph in Figure 5-3. Which species were not affected by the loss of species B?

species C only

the carrying capacity of an environment for a particular species at a particular time is

supply of the most limited resources

using resources at the rate in which they can be replaced is called

sustainable use

What type of vegetation would you expect to find on an abandoned farm that has remained undisturbed for 150 years?

tall, mature oak trees

age structure data includes all but

the amount of population change due to immigration or emigration.

Which biome has the greatest species biodiversity?

the rainforest

Examine the food web shown in the Figure above. What would most likely happen to the organisms in this food web if the robin began to disappear

there would be an overpopulation of caterpillar, which would kill many women trees

According to this graph, how long does it take for a habitat to recover from acid rain?

100 years

These estimates are based on the number of lizard sightings each year. Which recent event in the forest might explain the trend evident in the graph above

A new species of predatory bird was introduced to the forest in 2000.

What are forest fires, temperature fluctuations, and floods all examples of?

Abiotic, density-independent factors

Currently, the fastest-growing populations are in

Asia

What was the scientists' hypothesis concerning lake eutrophication in Experiment 1?

Run-off from farmland increases levels of phosphates and nitrates, speeding up the eutrophication process

Scientists suspect that leakage from sewage systems carrying wastewater from the houses on the lake also contributes to nutrient deposit in the lake. In order to test this hypothesis, what should the scientists do next?

Sample groundwater near the sewage systems, testing for phosphate and nitrate content.

which is a density independent factor for a flock of canada geese on a large lake

Unusually cold winter

A species of plant has exponential growth after it is introduced into an area where it has never been. Which statement best describes exponential growth?

Within a few years the population increases dramatically

competition for food can not occur

between animals from two different ecosystems

What happens to a population at zero population growth?

birthrate equals death rate