Test: Competition & Ecosystem Relationships 2023-24

Last updated almost 3 years ago

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Class Period

Which of the following are examples of biotic factors in a grassland ecosystem?

Air, dirt, water and grass

Zebra, lion and grass

Zebra, lion, grass, air,water and dirt

Air, dirt and water

Which of the following are examples of abiotic factors in a marine/ocean ecosystem.

Water, sand, algae and plankton

Fish, sharks, coral, algae, water and sand

Water, sand and oxygen

Fish, sharks, coral and algae

When two organisms are “fighting” for use of a limited resource, this is called a(n):.

Competitive relationship

Commensalistic relationship

Predatory relationship

Dependent relationship

Which of the following is an example of a dependent interaction?

All of the answer choices given are considered dependent interactions.

A shark depends on fish and other marine organisms as food.

Algae in the photic zone depends on the sun for photosynthesis.

A fish relies on other individuals within their population as a defense against predators.

Eagles and grizzly bears live together in the same habitat. There will be competition between the eagles and the grizzly bears only if which of the following is true?

Laws prevent humans from being able to hunt eagles or grizzly bears.

Pesticides in the fish population affect eagles’ eggs and decrease their population.

Grizzly bears hibernate during the winter while eagles remain active.

Both grizzly bears and eagles feed on the same species of salmon.

A student wants to investigate competition between two organisms. For the investigation, it is most important that the student should choose organisms that–

reproduce at the same rate.

require the same resources.

have the same adaptations.

are both active during the day.

Two species of fish live in the same pond. They eat the same kinds of plants. They are eaten by the same water birds. Which of the following would increase competition between these two species of fish?

Water level in the pond increases

Average habitat temperature increases

Number of food plants decreases

Population of water birds increases

Bromeliads are small plants that grow attached to the sides of large trees high above the ground in warm, damp, and densely crowded tropical rainforests. Why do bromeliads do this?

Bromeliads grow this way in competition for light energy that they can use for photosynthesis. By being attached to high trees, they can reach the light higher up without competing with shorter plants.

Bromeliads grow this way because they are an invasive species to the area.

Bromeliads grow this way due to their need to spread upward.  If they don’t they’ll feel crowded and not grow.

Which of the following are examples of types of competition that may occur in nature? Check all that apply

Competing for space

Competing for mates

Competing for food

Competing for sunlight

Which of the following are possible outcomes when resources are limited in an area? Check all that apply

There is less competition between organisms

The population of organisms may decrease

Reproduction rates increase

The growth rate of an organism may be affected

There will be more competition for the limited resources

Refer to the tables provided. Which plants may compete for sandy soil in Zone 9?

Every tree would compete for soil in Zone 9 because they both require a range of sandy soil with mixed calcium content.

Black hickory and sweetgum would compete for soil in Zone 9 because they both require sandy soil with high calcium content.

Sweet Gum and Chinese elm would compete for soil in Zone 9 because they both require sandy soil with average calcium content.

Black hickory and Chinese elm would compete for soil in Zone 9 because they both require sandy soil with average calcium content.

When you did the "Finding My Ecosystem Buddy" activity last class, what the relationship between the seal and the polar bear?

Most humans are hosts to thousands of microscopic mites on their faces, including your cheeks, eyelashes and foreheads! These mites are protected from predators because they live in your pores, and they get to eat the oils on your skin. You will never actually see one of these tiny critters, and they usually have no negative affect on you. What kind of interaction is occurring between humans and their face mites?

Parasitism

Mutualism

Predation

Commensalism

An elementary school had to send a letter home to parents instructing them to check their child's head for lice. Lice are little insects that live on your scalp and bite your skin to get food. The lice make your scalp really itchy, irritated, and inflamed. It takes a lot of effort to get rid of lice if they get into your hair. What is the relationship between humans and lice?

Mutualism

Predation

Commensalism

Parasitism

Cows have bacteria that live in their digestive tract. The bacteria help the cows digest all of the grass they eat, so the cows can get nutrients out of their food. The bacteria are happy because they have a great place to live and also get to eat the grass. What type of relationship is this?

Parasitism

Predation

Commensalism

Mutualism

A fire burned most of the plants in an area. Predict what would happen to the population of rabbits in that area for the next 6 months after the fire. CHOOSE ALL THAT APPLY!!!!

The population of rabbits would decline due to the lack of food

There would be increased competition between the rabbits for the plants that are left

The rabbit population would increase in size due to the abundance of plants

There would be no effect on the rabbits in the area

Predict what would happen to an organism if food suddenly became more abundant

The organism would be in a mutually beneficial relationship with the food

Less food would result in the slower growth of the organism

There would be increased competition between organisms for that type of food

More food would result in the faster growth of the organism

Compare the effects of predators on an ecosystem to the effects of an invasive species on an ecosystem

Predators species are meant to be there and help keep populations of native species in check, invasive species disrupt the food chain

Invasive species are meant to be there and help keep populations of native species in check, predators disrupt the food chain.

Invasive species feed off the host organism, predators eat their prey

Both predators and invasive species have the same effect on ecosystems.

Which of the following can be considered an "ecosystem"? Think back to the definition and check all that apply

Why do the populations of invasive species grow so quickly? choose all that apply

Invasive species may have characteristics/adaptations that help them thrive better in that ecosystem

Invasive species are prey to many animals

Invasive species are native to an area

Invasive species keep the ecosystem in balance

Invasive species have no predators

Class Period 

A 1/2

A 3/4

A 6/7

B 1/2

B 3/4

B 6/7

Which of the following are examples of biotic factors in a grassland ecosystem?

Air, dirt, water and grass

Zebra, lion and grass

Zebra, lion, grass, air,water and dirt

Air, dirt and water

Which of the following are examples of abiotic factors in a marine/ocean ecosystem.

Water, sand, algae and plankton

Fish, sharks, coral, algae, water and sand

Water, sand and oxygen

Fish, sharks, coral and algae

When two organisms are “fighting” for use of a limited resource, this is called a(n):.

Competitive relationship

Commensalistic relationship

Predatory relationship

Dependent relationship

Which of the following is an example of a dependent interaction?

All of the answer choices given are considered dependent interactions.

A shark depends on fish and other marine organisms as food.

Algae in the photic zone depends on the sun for photosynthesis.

A fish relies on other individuals within their population as a defense against predators.

Eagles and grizzly bears live together in the same habitat. There will be competition between the eagles and the grizzly bears only if which of the following is true?

Laws prevent humans from being able to hunt eagles or grizzly bears.

Pesticides in the fish population affect eagles’ eggs and decrease their population.

Grizzly bears hibernate during the winter while eagles remain active.

Both grizzly bears and eagles feed on the same species of salmon.

A student wants to investigate competition between two organisms. For the investigation, it is most important that the student should choose organisms that–

reproduce at the same rate.

require the same resources.

have the same adaptations.

are both active during the day.

Two species of fish live in the same pond. They eat the same kinds of plants. They are eaten by the same water birds. Which of the following would increase competition between these two species of fish?

Water level in the pond increases

Average habitat temperature increases

Number of food plants decreases

Population of water birds increases

Bromeliads are small plants that grow attached to the sides of large trees high above the ground in warm, damp, and densely crowded tropical rainforests. Why do bromeliads do this?

Bromeliads grow this way in competition for light energy that they can use for photosynthesis. By being attached to high trees, they can reach the light higher up without competing with shorter plants.

Bromeliads grow this way because they are an invasive species to the area.

Bromeliads grow this way due to their need to spread upward.  If they don’t they’ll feel crowded and not grow.

Which of the following are examples of types of competition that may occur in nature? Check all that apply

Competing for space

Competing for mates

Competing for food

Competing for sunlight

Which of the following are possible outcomes when resources are limited in an area? Check all that apply

There is less competition between organisms

The population of organisms may decrease

Reproduction rates increase

The growth rate of an organism may be affected

There will be more competition for the limited resources

Refer to the tables provided. Which plants may compete for sandy soil in Zone 9?

Every tree would compete for soil in Zone 9 because they both require a range of sandy soil with mixed calcium content.

Black hickory and sweetgum would compete for soil in Zone 9 because they both require sandy soil with high calcium content.

Sweet Gum and Chinese elm would compete for soil in Zone 9 because they both require sandy soil with average calcium content.

Black hickory and Chinese elm would compete for soil in Zone 9 because they both require sandy soil with average calcium content.

When you did the "Finding My Ecosystem Buddy" activity last class, what the relationship between the seal and the polar bear?

Predatory

Mutualism

Parasitism

Commensalism

Competitive

Most humans are hosts to thousands of microscopic mites on their faces, including your cheeks, eyelashes and foreheads! These mites are protected from predators because they live in your pores, and they get to eat the oils on your skin. You will never actually see one of these tiny critters, and they usually have no negative affect on you. What kind of interaction is occurring between humans and their face mites?

Parasitism

Mutualism

Predation

Commensalism

An elementary school had to send a letter home to parents instructing them to check their child's head for lice. Lice are little insects that live on your scalp and bite your skin to get food. The lice make your scalp really itchy, irritated, and inflamed. It takes a lot of effort to get rid of lice if they get into your hair. What is the relationship between humans and lice?

Mutualism

Predation

Commensalism

Parasitism

Cows have bacteria that live in their digestive tract. The bacteria help the cows digest all of the grass they eat, so the cows can get nutrients out of their food. The bacteria are happy because they have a great place to live and also get to eat the grass. What type of relationship is this?

Parasitism

Predation

Commensalism

Mutualism

A fire burned most of the plants in an area. Predict what would happen to the population of rabbits in that area for the next 6 months after the fire. CHOOSE ALL THAT APPLY!!!!

The population of rabbits would decline due to the lack of food

There would be increased competition between the rabbits for the plants that are left

The rabbit population would increase in size due to the abundance of plants

There would be no effect on the rabbits in the area

Predict what would happen to an organism if food suddenly became more abundant

The organism would be in a mutually beneficial relationship with the food

Less food would result in the slower growth of the organism

There would be increased competition between organisms for that type of food

More food would result in the faster growth of the organism

Compare the effects of predators on an ecosystem to the effects of an invasive species on an ecosystem

Predators species are meant to be there and help keep populations of native species in check, invasive species disrupt the food chain

Invasive species are meant to be there and help keep populations of native species in check, predators disrupt the food chain.

Invasive species feed off the host organism, predators eat their prey

Both predators and invasive species have the same effect on ecosystems.

Which of the following can be considered an "ecosystem"? Think back to the definition and check all that apply

A tropical rainforest

The insects, soil and fungi living under a rock

A fish tank

A classroom

A coral Reef

A grassland or Savannah

Why do the populations of invasive species grow so quickly? choose all that apply

Invasive species may have characteristics/adaptations that help them thrive better in that ecosystem

Invasive species are prey to many animals

Invasive species are native to an area

Invasive species keep the ecosystem in balance

Invasive species have no predators