Question 3
Black bears eat a wide variety of grasses, berries, fish, and small mammals to provide them with energy for growth and development. When a black bear eats a fish, what is the initial source of the energy it receives?
a
The fish contains energy from photosynthetic plants.
b
The fish contains energy stored in its muscle and fat cells.
c
The fish contains energy from minerals in the stream's water.
d
The fish contains energy from nutrients in stream sediments.
Question 4
What is the food Web? - Quora
Consider this food web. It is rich with animal species that fill a variety with niches within the ecosystem. Imagine that a local farmer has sprayed the area with insecticide. Predict how this might "initially" impact the food web and the roles each organism plays within it.
a
Although the farmer's spray would wipe out the insects, the other herbivores, rabbits, squirrels, mice and birds, would take over the empty niches and the food web would continue with very little change.
b
One section of the food web would be greatly impacted: the section containing the hawk and snake. They would quickly disappear due to the pesticide use.
c
One section of the food web would be greatly impacted right away: the section containing the insects and insect-eating animals. Without insects and possibly spiders, there would be no food for the frogs, shrews and insectivorous birds.
d
The entire food web would be decimated. The food web would collapse without this niche being filled due to the pesticides used.
Question 5
What is the typical percentage of LOSS of energy in the transfers from one trophic level to the next?
a
1%
b
10%
c
90%
d
5%
Question 6
Directions: The table below shows several organisms and their food sources. Use the table to answer any questions that follow.
Organism Food Source
Wolf Beavers and moose
Moose Trees (leaves)
Beaver Trees (bark)
Earthworm Organic matter
Tree Makes its own food
Which of the following would most likely happen if the moose disappeared?
a
The number of wolves would increase, as they would no longer compete with moose for food resources.
b
The number of earthworms would decline as the amount of available organic matter would decrease.
c
The number of beavers would decline as they became the wolves' primary food source.
d
The number of trees would decline, as moose would no longer fertilize them.
Question 3: b) The fish contains energy stored in its muscle and fat cells.
Question 4: c) One section of the food web would be greatly impacted right away: the section containing the insects and insect-eating animals. Without insects and possibly spiders, there would be no food for the frogs, shrews, and insectivorous birds.
Question 5: b) 10%
Question 6: d) The number of trees would decline, as moose would no longer fertilize them.