WorksheetsEcology Unit 2 Summative DHS
Total questions: 27
Worksheet time: 14mins
A pack of gray wolves living in a national park is an example of:
ecosystem
community
population
organism
An Individual gray wolve living in a national park is an example of:
ecosystem
community
population
organism
Hawks and foxes compete with one another to eat field mice. This is a form of what type of competition?g
interspecific competition
intraspecific competition
niche partitioning
Which of these is an example of parasitism?
A lion defends its territory
A squirrel stores food in a tree hole
A tapeworm feeds in a human’s intestines
A polar bear kills and eats a seal
Which of these is an example of predator and prey relationship?
A lion defends its territory
A squirrel stores food in a tree hole
A tapeworm feeds in a human’s intestines
A polar bear kills and eats a seal
Phytoplankton have the ability to make their own food using sunlight. Organisms that can make their own food are called?
consumers
producers
predators
Zebras live on the savannas of Africa. Zebras live in herds for protection from predators like lions and cheetahs. Living in a herd is a part of the organism’s
competition
ecological equilentcy
niche
Which of the following parts in the picture is an example of a biotic factor?
water
sun
tree
soil
What items in the picture is an example of an abiotic factor?
squirrel
acorn
tree
rocks
Wolves have an unusually large impact on the forest ecosystem, by helping to maintain deer population. Wolves are an example of:
a pioneer species
a keystone species
producer
Which of the following is a density-independent limiting factor?
hurricane
predation
competition
parasitism
What is the carrying capacity of the population in the graph below?
0
200
2000
What word best fits in Organism 1's box for mutualism?
benefits
harms
dead
For organsim #2, what would you put in the description for "commensalism"?
benefits
harms
neither benefits or harms
The maximum number of organisms that can be supported by an environment and is called the:
overshoot
carrying capacity
What situation below is an example of commensalism?
bees getting nectar from flowers and then the flowers getting pollinated from the bee traveling to different flowers
a remora fish using a shark to travel through the ocean
a tick biting a dog and sucking its blood
a tapeworm living in a human's stomach
What organism listed below usually reproduces by binary fission?
humans
cows
bacteria
plants
Species with limited resources usually exhibit a(n) ________ growth curve.
exponential
logistic
Species with no limit to their resources usually exhibit a(n) ________ growth curve.
exponential
logistic
The genetic material that most living things contain is called:
DNA
TLC
LOL
Cutting down forests changes the populations of more than trees. Imagine the organisms that lived in this forest. After the trees have been cut, fewer animals can survive here. What is the limiting factor affecting these populations?
amount of food
amount of water
amount of living space
What will most likely occur if two different plant species compete for the same requirements in an ecosystem?
both species will thrive
one species will die and the other will thrive
both species will die
The graph below indicates the size of a fish population over a period of time. The section of the graph labeled A represents:
carrying capacity
exponential growth
slope
Abiotic factors in an ocean ecosystem would be:
schools of fish
salt water
sea turtle
Which below DOES NOT influence population size?
birth rate
Death rate
Immigration
reproductive age
Organisms moving INTO an area is called:
immigration
emigration
A benefit of sexual reproduction is:
only one organism is needed to produce offspring
you can make many copies of yourself quickly
it increases genetic diversity
