Question

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.
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 3
Question 4
A) Jumping worms affect populations in forest ecosystems by directly competing with native (1 point)
primary consumers.
secondary consumers.
decomposers.
producers.
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 5
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.
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 7
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.
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 9
Question 10
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.
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 11
Question 12
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.
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 13
Question 14
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
A) Which component of a marine ecosystem is abiotic? (1 point)
shark
dolphin
algae
water

Answer 1

1) A disease kills individuals from the lion population.
2) Corals become more susceptible to disease.
3) Decomposers.
4) Evidence.
5) The two organisms are in a mutualistic relationship.
6) The two organisms are in a predator–prey relationship.
7) The relationship is competitive.
8) Dogs and fleas.
9) One organism eats another organism that makes its own food.
10) The flea population increases because there are more dogs to live on.
11) Some are better adapted.
12) They have no predators, so they can spread rapidly.
13) Increased temperatures.
14) Water.