Question 1 (2 points)
Which of the following describes a response to external stimuli?

Question 1 options:

a rabbit runs away from a fox that is chasing it

a woman drinks water when she is thirsty

a person yawns when oxygen levels in the blood are low

a boy eats food when he is hungry

Question 2 (2 points)
Which is an example of an internal stimulus?

Question 2 options:

an increase in the amount of water available to a plant

a decrease in oxygen levels in the blood during exercise

an artificial light that attracts insects

a sudden change of air temperature

Question 3 (2 points)
What kind of factors are light, temperature, and soil composition?

Question 3 options:

habitat

biotic

ecological

abiotic

Question 4 (2 points)
In an aquarium ecosystem, you may have a warm temperature, a light source, algae, fish, and rocks. Which are the biotic factors found in this ecosystem? Choose all that apply.

Question 4 options:

Algae

Light

Rocks

Fish

Question 5 (2 points)
Which choice describes a community?

Question 5 options:

a hole in which a snake lives

the desert

a forest of birds, insects, and squirrels

a desert of sand, rocks, hawks, and snakes

Question 6 (2 points)
Which of the following is an example of a producer?

Question 6 options:

sun

fern

chestnut

ant

Question 7 (2 points)
Which choice is an example of a consumer?

Question 7 options:

tree

fungi

bee

sun

Question 8 (2 points)
Which organism provides energy to all other organisms in this ecosystem?

Food web in form of a circle connected to each other with arrows showing Prairie grass connecting to Prairie dog and Grasshopper and Prairie dog further connecting to Coyote and Vulture and Grasshopper connecting to Coyote which further connects to Vulture.

Question 8 options:

vulture

coyote

prairie dog

prairie grass

Question 9 (2 points)
Which organism is responsible for cleanup in this ecosystem?

Food web in form of a circle connected to each other with arrows showing Prairie grass connecting to Prairie dog and Grasshopper and Prairie dog further connecting to Coyote and Vulture and Grasshopper connecting to Coyote which further connects to Vulture.

Question 9 options:

prairie grass

prairie dog

coyote

vulture

Question 10 (2 points)
Which organism is a primary consumer in this ecosystem?

Food web in form of a circle connected to each other with arrows showing Prairie grass connecting to Prairie dog and Grasshopper and Prairie dog further connecting to Coyote and Vulture and Grasshopper connecting to Coyote which further connects to Vulture.

Question 10 options:

coyote

vulture

prairie grass

grasshopper

Question 11 (2 points)
Which interaction is most likely to result in the most competition among the organisms?

Question 11 options:

Lions and vultures eat the remains left after a lion kill.

Producers and scavengers eat deer carcasses.

Sagebrush and cacti obtain light in the desert.

Grasshoppers and caterpillars eat oak leaves.

Question 12 (2 points)
Which of the following is an example of a mutualistic relationship?

Question 12 options:

A bird eating food from the alligator's mouth and cleaning the alligator's mouth

A barnacle on a turtle's back

A tick sucking nutrients from a deer

Mistletoe plant taking nutrients from another plant

Question 13 (2 points)
What is one way a population may decline?

Question 13 options:

High immigration

Low emigration

Low death rate

High emigration

Question 14 (2 points)
Biotic and abiotic factors can be limiting factors to a population.

Question 14 options:
True
False
Question 15 (2 points)
Invasive species always have negative impacts to the ecosystem in which they are introduced.

Question 15 options:
True
False