Question 1

Question

A) How could wildfire immediately impact competition in a forest ecosystem? (1 point)
Competition would increase. Wildfire would increase the scarcity of resources, causing
individuals to compete at higher rates.
Competition would decrease. Wildfire would decrease the number of individuals competing
for resources, making more resources available per individual.
Competition would remain the same. Wildfire would increase the scarcity of resources and
decrease individuals competing, effectively balancing each other out.
Competition would decrease. Many ecosystems rely on wildfire to restore nutrients and
germinate seeds; therefore, wildfire would increase resources available, lowering
competition.
Question 2
A) Two prides of lions compete with one another for the same prey
(
antelope
)
. Which
scenario would cause a decrease in competition? (1 point)
A disease kills individuals from the lion population.
Wildfire kills many antelope and some lions.
An invasive species outcompetes and replaces antelope.
Drought reduces the water available for all species.
Question 3
A) How do high temperatures affect corals? (1 point)
corals become more susceptible to disease
corals become more colorful
corals erode
corals collect more zooxanthellae
Question 4
A) Jumping worms affect populations in forest ecosystems by directly competing with
native (1 point)
primary consumers.
secondary consumers.
decomposers.
producers.
Question 5
A) In order to explain how changes to physical components of an ecosystem affect
populations, you must use data from observations and investigations. These data are also
known as (1 point)
a statement.
reasons.
evidence.
an argument.
Question 6
A) Some types of algae can grow together with fungi. The fungi provide nutrients from
decaying matter to the algae, while the energy the algae get from sunlight is shared with
the fungi. Based on this information, how would you describe this relationship? (1 point)
The fungus is a parasite, and the algae is the host.
The two organisms are in a mutualistic relationship.
The algae is the predator, and the fungus is the prey.
The two organisms are in competition.
Question 7
A) A hawk eats a mouse. This kills the mouse, but it also means that the remaining mice
will not have to compete as much for food with each other. Based on this information, what
is the relationship between the hawk and the mouse? (1 point)
The two organisms are in a parasitic relationship.
The two organisms are in a predator
prey relationship.
The two organisms are in a mutualistic relationship.
The two organisms are in a competitive relationship.
Question 8
A) A rat is trying to get food from a garbage can, but is chased away by a crow. The crow
eats the food, and the rat must find other food. Based on this information, what is the
relationship between the crow and the rat? (1 point)
The relationship is mutualistic.
The relationship is predator
prey.
The relationship is competitive.
The relationship is parasitic.
Question 9
A) Leaf
cutter ants cultivate fungus. The ants keep conditions optimal for fungus growth
and carry leaf fragments for the fungus to grow on. Then the ants feed on pieces of the
fungus. Which kind of relationship exists between the fungus and the ants? (1 point)
consumer/producer
symbiotic
parasite/host
predator/prey
Question 10
A) Which pair of organisms can be in a parasite/host relationship? (1 point)
bees and flowers
goats and grasses
dogs and fleas
snakes and mice
Question 11
A) Which statement describes a consumer/producer relationship? (1 point)
One organism eats another organism that makes its own food.
One organism that benefits from living in or on another organism at the expense of that
organism.
Both organisms benefit from each other.
One organism catches and consumes another organism.
Question 12
A) Fleas and dogs have a parasite/host relationship. What happens to the fleas in a home
when another dog is brought into the home? (1 point)
The flea population increases because the relationship is mutually beneficial.
The flea population decreases because the fleas harm the dogs they live on.
The flea population decreases because fleas are not be able to live on all dogs.
The flea population increases because there are more dogs to live on.
Question 13
A) When considering competition between individuals of the same species, what allows
some individuals to survive over others? (1 point)
Some are better adapted.
Some choose not to compete for resources.
Some do not need resources.
Some are not impacted by rapid changes.
Question 14
A) What might allow an invasive species to outcompete a native species? (1 point)
They use the same shelter or space.
They have no predators, so they can spread rapidly.
They are introduced by humans at high rates.
They eat the same food resources.
Question 15
A) Polar bears hunt for ringed seals by waiting for them to emerge from breathing holes in
the ice. Which abiotic change may decrease a polar bear’s ability to hunt? (1 point)
increased temperatures
increased seal population
increased ice cover
increased competition
Question 16
A) Which component of a marine ecosystem is abiotic? (1 point)
shark
dolphin
algae
water
Question 17
A) What happens to an ecosystem when the primary consumers disappear? (1 point)
Both the producer and secondary consumer populations increase.
Both the producer and secondary consumer populations decrease.
The producer population decreases, while the secondary consumer population increases.
The producer population increases, while the secondary consumer population decreases.
Question 18
A) Which activity might reduce habitat loss? (1 point)
removing invasive species
draining a wetland to plant fruit trees
spreading out the human population
replacing golf courses with farms
Question 19
A) The cones of lodgepole pine trees release their seeds when exposed to heat. Which
abiotic event may benefit this plant? (1 point)
flood
drought
tornado
fire
Question 20
A) Which is an example of a producer? (1 point)
mouse
deer
rose bush
bea

Answer 1

Here are the suggested answers to the questions based on ecological principles:

Question 1:
Answer: Competition would decrease. Many ecosystems rely on wildfire to restore nutrients and germinate seeds; therefore, wildfire would increase resources available, lowering competition.

Question 2:
Answer: A disease kills individuals from the lion population.

Question 3:
Answer: Corals become more susceptible to disease.

Question 4:
Answer: Decomposers.

Question 5:
Answer: Evidence.

Question 6:
Answer: The two organisms are in a mutualistic relationship.

Question 7:
Answer: The two organisms are in a predator-prey relationship.

Question 8:
Answer: The relationship is competitive.

Question 9:
Answer: Symbiotic.

Question 10:
Answer: Dogs and fleas.

Question 11:
Answer: One organism eats another organism that makes its own food.

Question 12:
Answer: The flea population increases because there are more dogs to live on.

Question 13:
Answer: Some are better adapted.

Question 14:
Answer: They have no predators, so they can spread rapidly.

Question 15:
Answer: Increased temperatures.

Question 16:
Answer: Water.

Question 17:
Answer: Both the producer and secondary consumer populations decrease.

Question 18:
Answer: Removing invasive species.

Question 19:
Answer: Fire.

Question 20:
Answer: Rose bush.

Feel free to ask if you have any further questions!