Gallagher - Ecology Part 1

B. Graph 2

A herbivore has been living successfully in its environment for years. Then a drought occurred and lasted for several years. Which graph from above would best represent the population of the herbivore during this period?(6c) A. Graph 1 B. Graph 2 C. Graph 3 D. Graph 4

B. The ecosystem would be able to support a larger carrying capacity of sunflowers

A field where a population of sunflowers grew, received unexpected amounts of soil nutrients and sunlight one spring. How would the sunflower population change?(6d) A. The ecosystem would have a decrease in the carrying capacity for sunflowers B. The ecosystem would be able to support a larger carrying capacity of sunflowers C. The limiting factors would remain the same and the population would not be affected D. The sunflower population would decrease because of too much nutrients and sunlight

C. The primary consumers receive more energy because the amount of energy at each trophic level decreases as it moves through the ecosystem.

A research scientist is trying to determine the amount of energy that is available to a trophic level in a freshwater lake ecosystem. If 1500 units of energy are available at the producer level, approximately how much energy is available to the primary consumers level?(6b) A. The primary consumers receive less energy because the amount of energy at each trophic level increases as it moves through the ecosystem. B. The primary consumers receive more energy because the amount of energy at each trophic level increases as it moves through the ecosystem. C. The primary consumers receive more energy because the amount of energy at each trophic level decreases as it moves through the ecosystem. D. The primary consumers receive less energy because the amount of energy at each trophic level decreases as it moves through the ecosystem.

A. The energy produced by the oak tree is passed to the squirrel whose diet includes acorns from oak trees.

At the local park, oak trees and squirrels are constantly using energy. Which statement is true about each organism? (6b) A. The energy produced by the oak tree is passed to the squirrel whose diet includes acorns from oak trees B. The squirrels provide energy to the oak tree and the oak tree uses it to grow acorns C. The squirrel acts a parasite and deprives the tree of nutrients D. The two organisms do not exchange energy because they are not dependent on one another

D. It would steadily increase

Bats eat insects that are harmful to corn and cotton crops. 1 million bats can eat 10 tons of insects every night. As the bat population increases, what could happen to the crop population?(6d) A. It would be affected a little. B. It would remain the same. C. It would be cut in half. D. It would steadily increase.

B. The producers were unable to make their own food causing others in the ecosystem to suffer as a whole.

During the Jurassic era, a large meteor struck the Earth causing a dust cloud to cover the sun for a long period of time. What effect did this have on the producers? (6b) A. The producers continued to get their energy by eating other organisms. No effects were felt B. The producers were unable to make their own food causing others in the ecosystem to suffer as a whole C. The producers switched to consumers and began getting energy from other organisms D. The consumers would switch into producers and begin making energy

C. Competition among owls would increase

If the number of owls in a forested area doubled in 10 years, what would happen to the owl population over time?(6c) A. The size of the owl population would increase due to limited resources B. The increase would cause a disease to move into the area C. Competition among owls would increase D. Competition among owls would decrease

D. The lion is the secondary consumer and the giraffe is the primary consumer

In an African savanna, a relationship exists between a lion and a giraffe.The lion hunts, kills, and eats the giraffe. What can you conclude from this information?(6b) A. There are more lions in the savanna than giraffes B. The lion gets its energy directly from the trees C. The lion is the primary consumer and the giraffe is the secondary consumer D. The lion is the secondary consumer and the giraffe is the primary consumer

D. They are all consumers.

In an ecosystem, what do omnivores, herbivores, carnivores, and decomposers have in common?(6b) A. They are all predators. B. They are all prey. C. They are all producers. D. They are all consumers.

B. owl and snake

In this diagram, the frog provides for which organisms? A. grasshopper and squirrel B. owl and snake C. fox and owl D. grasshopper and mouse

A. Top predators, such as birds, often take in the pesticides contained in the bodies of their prey

Pesticides are used by farmers for removing pests, such as insects, from their crops. Pesticides are known to "move up the food chain". What does this mean?(6b) A. Top predators, such as birds, often take in the pesticides contained in the bodies of their prey B. Pesticides have the same effect on larger animals as it does on insects C. Birds and predatory animals are unaffected by pesticides D. Pesticides kill the crops before they can be harvested

A. It will decrease in number.

The red-coackaded woodpecker is found in the pine forests of Georgia. Its eats insects found in the barks of the pine trees and nests in the trees. How will a reduction in the number of the pine trees MOST LIKELY affect the red-coackaded woodpecker?(6d) A. It will decrease in number. B. It will adapt to a new habitat. C. It will build nests in other trees. D. It will hide better from animals that eat it.

C. After a period of time the deer adjusted to the available food on the island.

Use the graph to answer the next question. Which of the following situations MOST likely produced this population of deer on WallaWalla Island?(6c) A. Deer predators were removed from the island before the deer arrived. B. The deer overgrazed the grasses immediately upon their arrival to the island. C. After a period of time the deer adjusted to the available food on the island. D.The deer contracted a new disease just after their arrival on the island.

A. the predator

What is the role of the raccoon in this food web?(6b) A. the predator B. the producer C. the herbivore D. the prey

C. the grasshopper population would increase

What would happen if the frog was removed from the ecosystem shown in this diagram? A. No other organisms would be affected B. The snake population would increase C. The grasshopper population would increase D. The owl population would increase

D. An outbreak of a disease that infects squirrels in the park

Which of the following could limit the growth of a population of squirrels in a local park?(6c) A. Increase in the number of trees preferred by the squirrels for nests B. A decrease in the number of hawks, which prey on squirrels C. Heavy rain causing an increase in acorns that squirrels eat D. An outbreak of a disease that infects squirrels in the park

C. All of the plants, trees, elk and grasshoppers in the forest

Which of the following is an example of a community?(6a) A. The elk in the forest B. All of the trees, ponds, and soil in the forest C. All of the plants, trees, elk, and grasshoppers in the forest D. All of the grasshoppers in a forest

C. Food chains show the one-way flow of energy in an ecosystem and food webs show how those chains are linked together in the ecosystem

Which of the following is the difference between food webs and food chains?(6b) A. The source of energy for a food web is the sun, and the source of energy for a food chain is a producer B. Food webs begin with a consumer and food chains begin with a producer C. Food chains show the one-way flow of energy in an ecosystem and food webs show how those chains are linked together in the ecosystem D. Food chains only include 3 levels of consumers while food webs show many more

B. temperature of the soil

Which of these factors is an abiotic factor in a desert biome?(6a) A. different types of cacti B. temperature of the soil C. desert lizards D. rattlesnake

D. the producers

Which organisms would directly benefit from the decomposers in the ecosystem? A. Only other decomposers B. The primary consumers C. The secondary consumers D. The producers