WorksheetsSb5A
Total questions: 22
Worksheet time: 11mins
Is this standard 5a?
Plan and carry out investigations and analyze data to support explanations about factors affecting biodiversity and populations in ecosystems.
True
False
Which of the following statements describes density-independent limiting factors? SB5a
Environmental extremes, such as a hurricane or drought, are examples.
Competition is an example.
A population is increasing in a pattern of logistic growth. What happens when the population reaches carrying capacity? SB5a
The size of the population remains at or near its maximum.
The size of the population continues to grow exponentially.
The wolves and moose of Isle Royale are the focus of the longest-running study of a predator-prey system in the wild. Both are recent arrivals to Isle Royale: moose swam to the island in the early 1900’s. Wolves followed decades later, traveling over the ice from Canada in the 1940’s. About 40 years into the study, the wolf population crashed when humans introduced the canine-parvovirus. Additional factors over the years have impacted both populations. At one point during the study, the moose population collapsed during the most severe winter on record followed by an outbreak of moose ticks.
What point on the graph represents the outbreak of moose ticks and a drastic decline in the moose population? 5Ba
Point A
Poin B
Point C
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unlimited resources and no competition
the introduction of a food source that bacteria cannot use
high competition for limited resources
Vernon is studying the population of deer in a tract of forest. He gathers the following data.
Birth rate: ~50 deer/year Death rate: ~70 deer/year
Which additional observation would support the conclusion that the deer population is NOT changing size from year to year, meaning that the net population change is 0? SB5a
The organism's preferred habitat.
The kind of place an organism occupies.
About 20 deer per year immigrate to the tract of forest.
A parasite is an organism that _____________________________.
SB5a
Both helps and harms another organism
Only harms another organism
Only helps another organism
Neither helps or harms another organism
Which one of the following describes, in part, the niche of a rabbit? SB5a
the wind in the area it lives.
the golf course it lives on and eats grass on.
rabbits are eaten by coyotes
sunlight
The difference between a habitat and a niche is that a niche is? SB5a
The specific functional role of an organism.
The organism's preferred habitat.
The kind of place an organism occupies.
None of the above.
The graph shows the changes in population size of two species that live in the same habitat. Which conclusion can be made regarding the species? SB5a
Species 2 is a predator of Species 1
Species 1 is a predator of Species 2
According to the information above, which of these is responsible for the decrease in the black-footed ferret population? SB5a
Reduced numbers of prairie dogs
Development of managed wildlife areas
Competition with prairie dogs for resources
What is a group of individual organisms that belong to the same species? SB5a
Population
Biome
Ecosystem
Community
All of the following would be considered evidence that would support the claim by a scientist that he had identified a mutualistic relationship EXCEPT. SB5a
One organism is being harmed in the relationship
Both organisms seem to be thriving in the environment
The organisms are only found together
Separating the organisms seems to have a negative effect
If two species of organisms occupy the same niche ____________. SB5a
one will find a new habitat.
competition will be very intense.
both organisms will become extinct.
both will need to enlarge their habitat.
The difference between a habitat and a niche is that a niche is _______________. SB5a
The specific functional role of an organism.
The organism's preferred habitat.
The kind of place an organism occupies.
None of the above.
A team of scientists visits an island in the Caribbean Sea. They find a diverse community of turtles, lizards, birds, and a variety of trees, shrubs, and grasses. No humans live on the island.
Several years later, the scientists return to the island. They find a much smaller community, with reduced populations of all of the species they had identified earlier. Some of the animals now appear to be absent from the island.
Which is the most likely explanation for the changes that the scientists observed? SB5a
A disease or parasite affected all of the island populations.
Competition for resources caused all of the island populations to decrease at the same time.
A natural disaster, such as a hurricane, struck the island.
Stress from overcrowding affected all of the island populations.
Alligators will use their powerful feet, tail, and snouts to dig a hole through the mud, producing small ponds known as "alligator holes." Many other species benefit from alligator holes. During the dry season, fish, turtles, and other aquatic animals live in the alligator holes. Birds, terrestrial animals, and plants use these holes as a source of water.
What term best describes the role of alligators in this ecosystem? SB5a
Invasive exotic species
Keystone species
Producer
Primary consumer
The area inhabited by a population is called its ______________. SB5a
geographic range.
distribution.
niche.
density.
What type of population growth is shown in the graph? SB5a
logistic growth
exponential growth
What type of population growth is shown in the graph? SB5a
logistic growth
exponential growth
What phase is carrying capacity? SB5a
Phase I: Rapid growth
Phase II: Slow growth
Phase III: No growth
A population is increasing in a pattern of logistic growth. What happens when the population reaches carrying capacity? SB5a
The size of the population remains at or near its maximum.
The size of the population continues to grow exponentially.
The growth rate increases because deaths increase.
The growth rate decreases because births increase.
