Investigating Ecosystems

When a polar bear and penguins hunt for fish. What is this an example of?

• Dependency on abiotic factors

• Competition for biotic factors

• Dependency on temperature changes

• Competition for abiotic factors

According to this food web, which

organisms do the hawk and fox compete for?

• Rabbits & Mice

• Mice & Frogs

• Birds & Grasshoppers

• Rabbits & Snakes

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There are many birds in the world whose diet consists of fruits, leaves, nuts, and seeds of plants. Which

of the following best describes how different birds depend on biotic factors in their

ecosystem?

• Some plants produce fruits and seeds year-round, which birds eat

• Tall trees grow close together, creating shade for animals in the rainforest

• Rainfall creates high humidity levels, which help maintain the bird's feathers

• Temperatures remain consistent, allowing macaws to stay active year-

  round

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The following graph shows...

• The relationship of purple frogs in a swamp ecosystem compared to the green bugs

• The predatory relationship between frogs and small bugs

• The relationship between the number of

  predators in a population depends on the number of prey

• The relationship between frogs and small bugs in a swamp ecosystem

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The following graph demonstrates....

• As the bug (prey) population increases, the frog (predator) population also increases, however if the prey population were to decrease so would the predator population

• As the bug (prey) population increases, the frog (predator) population also increases, however if the prey population were to decrease there would be no affect on the predator population

• As the bug (prey) population increases, the frog (predator) population also increases, however if the prey population were to increase there would be a decrease on the predator population

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Which of the following describes a change in biotic factors that benefits a

species of freshwater plants in a pond ecosystem?

• The population of herbivorous fish in the pond decreases, reducing

  predation

• Rainfall increases, causing the pond to expand and provide more space

• Algae growth in the pond blocks sunlight from reaching the plants

• A new plant species grows in the pond, competing for resources

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Which of the following are biotic or abiotic?

• 2. 2. Biotic

• 2. 2. Moss

• 1. 1. Abiotic

• 1. 1. Water

• 2. 2. Abiotic

• 1. 1. Bacteria

• 1. 1. Biotic

• 2. 2. Rocks

Answer explanation

Moss and bacteria are both living things.

Select all that apply: Which of the following are biotic or abiotic?

• Abiotic

• Moss

• Biotic

• Sunflower

• Biotic

• Rocks

• Abiotic

• Water

• Biotic

• Bacteria

Answer explanation

Moss and bacteria are both living things.

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Sloth's and monkeys share the same tropical habitat. Deforestation is occurring limiting the space for these 2 species. What will now occur between the 2 species?

• Mutalism

• Commensalism

• Predation

• Competition

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a relationship that occurs when two or more organisms of the same species need the same resource at the same time

• competition

• symbiosis

• predation