Question

3. (08.06 MC) A biologist conducted an experiment on two islands (A and B) of similar size, climate, species composition, and richness. Originally, the same species of hawk, an apex predator, was present on both islands and no other predators challenged them. In her experiment, the biologist removed the hawk from island A but not from island B. She then recorded the number of animal species on each island over a period of 24 months. The data collected is shown in the graph below: (3 points) Number of Species 45 40 35 30 25 20 15 10 5 1 1 4 7 10 13 16 19 22 Time (months) Analyze the data above in terms of interspecific relationships and communities. Which statement best explains the difference in species present on each island over the course of the experiment? The hawk was a keystone species. The hawk was a foundation species. Island A needs the hawk as an ecosystem engineer. Island B lost diversity due to the remaining hawks. 4. (08.06 MC) Two hawk species are present in the same ecosystem. Hawk A feeds on mice and squirrels, both of which feed on seeds and nuts. Hawk species B eats snakes that feed on mice and squirrels. Based on these observations, which description best explains the role of the producers (seeds and nuts) in this community? (3 points) The producers act as allogenic engineers. The producers support diverse feeding relationships. Hawk B population will decrease when seeds increase. Hawk A population will decrease due to competition.

          3. (08.06 MC)
A biologist conducted an experiment on two islands (A and B) of similar size, climate, species composition, and richness. Originally, the same species of hawk, an apex predator, was present on both islands and no other predators challenged them. In her experiment, the biologist removed the hawk from island A but not from island B. She then recorded the number of animal species on each island over a period of 24 months. The data collected is shown in the graph below: (3 points)
Number of Species
45
40
35
30
25
20
15
10
5
1
1 4 7 10 13 16 19 22
Time (months)
Analyze the data above in terms of interspecific relationships and communities. Which statement best explains the difference in species present on each island over the course of the experiment?
The hawk was a keystone species.
The hawk was a foundation species.
Island A needs the hawk as an ecosystem engineer.
Island B lost diversity due to the remaining hawks.
4. (08.06 MC)
Two hawk species are present in the same ecosystem. Hawk A feeds on mice and squirrels, both of which feed on seeds and nuts. Hawk species B eats snakes that feed on mice and squirrels. Based on these observations, which description best explains the role of the producers (seeds and nuts) in this community? (3 points)
The producers act as allogenic engineers.
The producers support diverse feeding relationships.
Hawk B population will decrease when seeds increase.
Hawk A population will decrease due to competition.

3. (08.06 MC)
A biologist conducted an experiment on two islands (A and B) of similar size, climate, species composition, and richness. Originally, the same species of hawk, an apex predator, was present on both islands and no other predators challenged them. In her experiment, the biologist removed the hawk from island A but not from island B. She then recorded the number of animal species on each island over a period of 24 months. The data collected is shown in the graph below: (3 points)
Number of Species
45
40
35
30
25
20
15
10
5
1
1 4 7 10 13 16 19 22
Time (months)
Analyze the data above in terms of interspecific relationships and communities. Which statement best explains the difference in species present on each island over the course of the experiment?
The hawk was a keystone species.
The hawk was a foundation species.
Island A needs the hawk as an ecosystem engineer.
Island B lost diversity due to the remaining hawks.
4. (08.06 MC)
Two hawk species are present in the same ecosystem. Hawk A feeds on mice and squirrels, both of which feed on seeds and nuts. Hawk species B eats snakes that feed on mice and squirrels. Based on these observations, which description best explains the role of the producers (seeds and nuts) in this community? (3 points)
The producers act as allogenic engineers.
The producers support diverse feeding relationships.
Hawk B population will decrease when seeds increase.
Hawk A population will decrease due to competition.

Added by Jonathan L.

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