Question 1 (2 points)
Which of the following describes a response to external stimuli?
<...
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
Answers: 3
Biology, 22.06.2019 13:30, jasminecoronetti44
Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?
Answers: 3
Biology, 22.06.2019 15:40, TrivialRen1894
Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine
Answers: 2
Biology, 22.06.2019 20:30, tyhe
Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak
Answers: 3
Mathematics, 21.06.2019 19:00
Mathematics, 21.06.2019 19:00
History, 21.06.2019 19:00
World Languages, 21.06.2019 19:00