WorksheetsAnimal Population
Total questions: 25
Worksheet time: 25mins
Scientists have been studying the size of three populations in a grassland. In this ecosystem, lizards eat fireflies, and fireflies eat gnats (a type of insect). The data showed that all three populations were stable. Then the lizard population decreased suddenly. What will most likely happen to the size of the firefly population as a result? The firefly population will . . .
increase
stay the same
decrease
Scientists have been studying the size of three populations in a region. In this ecosystem, lions eat wild pigs, and wild pigs eat frogs. The data showed that all three populations were stable. Then the frog population decreased suddenly. What will likely happen to the size of the wild pig population as a result? The size of the wild pig population will . . .
increase
stay the same
decrease
Scientists have been studying the size of three populations in a swampland. In this ecosystem, herons (a type of bird) eat frogs, and frogs eat dragonflies. The data showed that all three populations were stable. Then the dragonfly population increased suddenly. What will likely happen to the frog population as a result? The size of the frog population will . . .
increase
stay the same
decrease
Scientists have been studying the size of three populations in Peru. In this ecosystem, pumas (large wild cats) eat deer, and deer eat grass. The data showed that all three populations were stable. Then the puma population increased suddenly. What will most likely happen to the size of the deer population as a result? The size of the deer population will . . .
increase
stay the same
decrease
Carrying capacity is...
The maximum number of individuals that can fit into an area
Ability of an area to accommodate a growing population
The greatest # of individuals an area can support over time.
The maximum number of species that can co-exist in an area
Carrying capacity is...
The maximum number of individuals that can fit into an area
Ability of an area to accommodate a growing population
The greatest # of individuals an area can support over time.
The maximum number of species that can co-exist in an area
Which factor is a density-dependent limiting factor on the population of a species?
seasonal variation
natural disasters
unusual weather
predation
A population is
a group of similar species in different areas
a group of the same species in the same geographic area.
a group of several species in the same geographic area
a group of several species along with their abiotic factors in a small area.
A good way to estimate the population size.
mark-recapture
count everyone of them
satellites
cameras
Individuals gather in patches, influenced by resource availability and behavior.
clumped dispersion
random dispersion
uniform dispersion
isolated dispersion
A population is...
All members of one species in one area
All members of all species that live in one area
All of the living and nonliving things in an area
None of these
A population of tigers lives in Bangladesh. Over 50 years, the size of the tiger population increased. What best explains the increase in the size of the tiger population?
A lot of tigers were born and none of them died.
The tiger population is always increasing because no animal eats tigers.
Fewer tigers were born than died.
More tigers were born than died.
In Australia, both opossums and foxes eat rats. The sizes of the populations have been stable for the last 12 years, but recently the size of the opossum population increased. What will likely happen to the fox population?
The size of the fox population will . . .
increase
stay the same
decrease
A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?
A lot of bluefish died and no new bluefish were born.
More bluefish were born than died.
Fewer bluefish were born than died.
The bluefish population is always decreasing because bluefish are always being eaten.
In the Arctic Ocean, sharks eat whales, and whales eat crabs. In the last 10 years, the sizes of the populations have been stable, but recently the size of the crab population increased. What will likely happen to the shark population? The size of the shark population will . . .
increase
stay the same
decrease
A large population of ducks lives in an area with a lake. In the last 40 years, the size of the duck population has stayed the same. What must be true about the duck population during the last 40 years?
The number of ducks that were born was the same as the number of ducks that died.
No ducks were born and no ducks died.
Humans started protecting the duck population so they stopped dying.
The ducks did not have any baby ducks during these years.
Which of the following is a biotic factor that can affect animal population size?
A) Temperature
B) Predation
C) Water availability
D) Soil composition
What is the term for the maximum population size that an environment can sustain indefinitely?
A) Carrying capacity
B) Population density
C) Biotic potential
D) Limiting factor
Which method is commonly used to estimate animal population size in a given area?
A) Quadrant sampling
B) Mark-recapture
C) Satellite imaging
D) Genetic analysis
In a predator-prey relationship, what typically happens to the prey population if the predator population increases?
A) The prey population increases
B) The prey population decreases
C) The prey population remains stable
D) The prey population becomes extinct
What is the primary reason for animal migration in relation to population dynamics?
A) To find new mates
B) To escape predators
C) To find food and resources
D) To establish new territories
Which of the following is an example of a density-independent factor affecting animal populations?
A) Disease
B) Competition
C) Natural disaster
D) Predation
What is the effect of habitat fragmentation on animal populations?
A) Increases genetic diversity
B) Decreases genetic diversity
C) Stabilizes population size
D) Has no effect
Which of the following best describes a keystone species?
A) A species that is the most abundant in an ecosystem
B) A species that has a disproportionately large effect on its environment
C) A species that is at the top of the food chain
D) A species that is the primary producer in an ecosystem
What is the term for the movement of individuals into a population from another area?
A) Emigration
B) Immigration
C) Migration
D) Dispersal
