Ecosystem Interactions Quick Check

1 of 51 of 5 Items
Question
Which of the following is expected to happen to a species' population when resources are stable over a long period of time and the species have reached carrying capacity?(1 point)
Responses

The population will die out.
The population will die out.

The population will stay the same.
The population will stay the same.

The population will decrease.
The population will decrease.

The population will increase.
The population will increase.
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Which factor may increase a rabbit population?(1 point)
Responses

decrease in space
decrease in space

decrease in food
decrease in food

decrease in temperature
decrease in temperature

decrease in predators
A group of mountain gorillas has 10 members. How big is the group after 4 females emigrate, 2 females immigrate, 2 gorillas are born, and a male dies?(1 point)
Responses

7
7

1
1

9
9

13
Predator/prey interactions regulate the populations of both groups. Which chain of events follows from an increase in predators?(1 point)
Responses

decrease in prey → increase in predators → decrease in prey
decrease in prey → increase in predators → decrease in prey

increase in prey → decrease in predators → decrease in prey
increase in prey → decrease in predators → decrease in prey

increase in prey → increase in predators → decrease in prey
increase in prey → increase in predators → decrease in prey

decrease in prey → decrease in predators → increase in prey
Use the image to answer the question.

A coyote holding a badger in its mouth.

In the image, a coyote has caught and killed a badger. The coyote’s aim is to eat the badger to obtain the energy it needs to survive.

What type of relationship is described?

(1 point)
Responses

predator-prey
predator-prey

parasitism
parasitism

mutualism
mutualism

competition
competition
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1 answer

Let's go through each question one by one:

  1. Which of the following is expected to happen to a species' population when resources are stable over a long period of time and the species have reached carrying capacity?

    • Correct Response: The population will stay the same.
  2. Which factor may increase a rabbit population?

    • Correct Response: decrease in predators. (Fewer predators would likely lead to an increase in rabbit population.)
  3. A group of mountain gorillas has 10 members. How big is the group after 4 females emigrate, 2 females immigrate, 2 gorillas are born, and a male dies?

    • Calculation: 10 - 4 + 2 + 2 - 1 = 9.
    • Correct Response: 9.
  4. Predator/prey interactions regulate the populations of both groups. Which chain of events follows from an increase in predators?

    • Correct Response: decrease in prey → increase in predators → decrease in prey. (As prey decreases, predators may temporarily increase due to better food availability, but ultimately, the prey population will decrease further.)
  5. In the image, a coyote has caught and killed a badger. The coyote’s aim is to eat the badger to obtain the energy it needs to survive. What type of relationship is described?

    • Correct Response: predator-prey. (The coyote is the predator, and the badger is the prey.)

If you have any further questions or need additional assistance, feel free to ask!