Ecology Review Test

Fill in the Blanks

A species that is ____________, no longer exists.

A species that is extinct, no longer exists.

The region of Earth where living organisms exist is called the _______________.

The region of Earth where living organisms exist is called the biosphere.

Shelter, space, food, and water are all essential parts of an organism’s _________________.

Shelter, space, food, and water are all essential parts of an organism’s habitat.

The loss of water through the pores in the leaves of a plant is called _____________.

The loss of water through the pores in the leaves of a plant is called transpirtation.

The maximum number of organisms that can survive in an ecosystem is referred to as _______________.

The maximum number of organisms that can survive in an ecosystem is referred to as carrying capacity.

Top carnivores are most negatively affected by __________________.

Top carnivores are most negatively affected by biological magnification.

The products of _________________ are CO2, H2O, and energy.

The products of cellular respiration are CO2, H2O, and energy.

_________________ is the path of an element through an ecosystem.

Nutrient cycle is the path of an element through an ecosystem.

_________________ are organisms that can make their own food.

Producers are organisms that can make their own food.

The reactants of _________________ are CO2, H2O, and energy.

The reactants of photosynthesis are CO2, H2O, and energy.

True and False

Available energy increases as you move up the trophic levels. True False

Available energy increases as you move up the trophic levels. True False – decreases as you move up the trophic levels

Extirpated is a term to describe a species that is close to extinction in all parts of Canada. True False

Extirpated is a term to describe a species that is close to extinction in all parts of Canada. True False – it is extinct in Canada (or a certain area) but found in other parts of the world

Photosynthesis is a complimentary process with percolation. True False

Photosynthesis is a complimentary process with percolation. True False – cellular respiration

Eutrophication is caused by excess nutrients in a lake. True False

Eutrophication is caused by excess nutrients in a lake. True False

Tertiary consumers are found in the third trophic level of a food chain. True False

Tertiary consumers are found in the third trophic level of a food chain. True False – 4th trophic level

Arrows in food chains point in the direction of predator to prey. True False

Arrows in food chains point in the direction of predator to prey. True False – prey to predator

The burning of fossil fuels decreases the amount of atmospheric CO2. True False

The burning of fossil fuels decreases the amount of atmospheric CO2. True False – increases the amount of CO2.

The reason that food chains are only 4 to 5 links long is because 25 % of energy is transferred at each link. True False

The reason that food chains are only 4 to 5 links long is because 25 % of energy is transferred at each link. True False – only 10% of the energy is transferred at each link

Autotrophs get their energy from the Sun. True False

Autotrophs get their energy from the Sun. True False

Secondary consumers eat producers. True False

Secondary consumers eat producers. True False – secondary consumers eat primary consumers

Multiple Choice

Groups of different species of organisms that interact together. a) community b) population c) ecosystem d) habitat

Groups of different species of organisms that interact together. a) community b) population c) ecosystem d) habitat

The number of individuals in a given area. a) climax community The number of individuals in a given area. a) climax community b) carrying capacity c) population stability d) population density

The number of individuals in a given area. a) climax community The number of individuals in a given area. a) climax community b) carrying capacity c) population stability d) population density

Which of the following is not a density-independent factor that limits population? a) disease b) forest fire c) drought d) change in climate

Which of the following is not a density-independent factor that limits population? a) disease b) forest fire c) drought d) change in climate

An example of intraspecific competition would be a) wolves and foxes An example of intraspecific competition would be a) wolves and foxes b) foxes and coyotes c) wolves and wolves d) coyotes and foxes

An example of intraspecific competition would be a) wolves and foxes An example of intraspecific competition would be a) wolves and foxes b) foxes and coyotes c) wolves and wolves d) coyotes and foxes

Which organism would likely be most affected by biomagnification in a food web? a) grasshopper b) frog c) snake d) hawk

Which organism would likely be most affected by biomagnification in a food web? a) grasshopper b) frog c) snake d) hawk

The amount of energy lost to the environment at each trophic level is a) 10 % b) 25 % c) 80% d) 90 %

The amount of energy lost to the environment at each trophic level is a) 10 % b) 25 % c) 80% d) 90 %

The units used in a pyramid of biomass would be a) km. b) kJ c) kg The units used in a pyramid of biomass would be a) km b) kJ c) kg d) ks

The units used in a pyramid of biomass would be a) km. b) kJ c) kg The units used in a pyramid of biomass would be a) km b) kJ c) kg d) ks

An otter that hunts and eats salmon is which of the following? a) consumer b) decomposer c) herbivore d) scavenger

An otter that hunts and eats salmon is which of the following? a) consumer b) decomposer c) herbivore d) scavenger

Which of the following is not part of the water cycle Which of the following is not part of the water cycle? a) evapouration b) condensation c) transpiration d) ammonification

Which of the following is not part of the water cycle Which of the following is not part of the water cycle? a) evapouration b) condensation c) transpiration d) ammonification

A snake is a example of a: a) producer A snake is a example of a: a) producer b) primary consumer c) secondary consumer d) decomposer

A snake is a example of a: a) producer A snake is a example of a: a) producer b) primary consumer c) secondary consumer d) decomposer

Which of the following species is not an exotic (invasive) species Which of the following species is not an exotic (invasive) species? a) bison b) cow c) zebra mussels d) Asian lady beetle

Which of the following species is not an exotic (invasive) species Which of the following species is not an exotic (invasive) species? a) bison b) cow c) zebra mussels d) Asian lady beetle

Which of the following does not have a natural predator Which of the following does not have a natural predator? a) herbivore b) carnivore c) top carnivore d) producer

Which of the following does not have a natural predator Which of the following does not have a natural predator? a) herbivore b) carnivore c) top carnivore d) producer

Agriculture causes the following problems except: a) habitat lost b) bioaccumulation c) increase of biodiversity d) an artificial ecosystem

Agriculture causes the following problems except: a) habitat lost b) bioaccumulation c) increase of biodiversity d) an artificial ecosystem

In the following food chain, which organism would likely contain the largest amount of D.D.T.? Plankton  Squid  Fish  Dolphin a) the plankton b) the squid c) the fish d) the dolphin

In the following food chain, which organism would likely contain the largest amount of D.D.T.? Plankton  Squid  Fish  Dolphin a) the plankton b) the squid c) the fish d) the dolphin

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. What is the food-chain in this situation? a) producer: blueberries  first-order consumer: deer  second-order consumer: eye-flies b) producer: eye-flies  first-order consumer: deer  second-order consumer: blueberries c) producer: sun  first-order consumer: deer  second-order consumer: eye-flies d) producer: deer  first-order consumer: blueberries  second-order consumer: eye-flies

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. What is the food-chain in this situation? a) producer: blueberries  first-order consumer: deer  second-order consumer: eye-flies b) producer: eye-flies  first-order consumer: deer  second-order consumer: blueberries c) producer: sun  first-order consumer: deer  second-order consumer: eye-flies d) producer: deer  first-order consumer: blueberries  second-order consumer: eye-flies

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Suppose the population of eye-flies becomes so large that the eyes of many deer are badly damaged. What will be the probable effect on the organisms in the food chain? a) the blueberry population will decrease b) the blueberry population will increase c) the deer population will increase d) all populations will increase

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Suppose the population of eye-flies becomes so large that the eyes of many deer are badly damaged. What will be the probable effect on the organisms in the food chain? a) the blueberry population will decrease b) the blueberry population will increase c) the deer population will increase d) all populations will increase

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. An Oriental beetle that feeds only on eye-flies is now brought into the region. If the beetles thrive, what will the probable effect be on the organisms in the food chain? a) the deer population will increase b) the blueberry population will increase c) the eye-fly population will increase d) all populations will decrease

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. An Oriental beetle that feeds only on eye-flies is now brought into the region. If the beetles thrive, what will the probable effect be on the organisms in the food chain? a) the deer population will increase b) the blueberry population will increase c) the eye-fly population will increase d) all populations will decrease

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Assume that the beetles kill all the eye-flies in the region. It could be reasonably predicted that the a) blueberry population will increase in proportion to the beetle population. b) beetle population will increase in proportion to the deer population. c) deer population will increase to the limit of its food supply. d) deer population will decrease.

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Assume that the beetles kill all the eye-flies in the region. It could be reasonably predicted that the a) blueberry population will increase in proportion to the beetle population. b) beetle population will increase in proportion to the deer population. c) deer population will increase to the limit of its food supply. d) deer population will decrease.

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Assume that all eye-flies in the region have been destroyed. It can reasonably be expected that a) the deer will die out. b) the consumption of blueberries will stop c) the beetles will die out. d) the blueberries will die out.

Questions 35-39 are based on the following situation:  In a certain region the eyes of deer are parasitized by flies. Assume that the “eye-flies” can live only as parasites on the eyes of the deer. The principal food in the diet of the deer is blueberry bushes. Assume that all eye-flies in the region have been destroyed. It can reasonably be expected that a) the deer will die out. b) the consumption of blueberries will stop c) the beetles will die out. d) the blueberries will die out.

The producers in an ecosystem are a) heterotrophs The producers in an ecosystem are a) heterotrophs b) autotrophs c) parasites d) omnivores

The producers in an ecosystem are a) heterotrophs The producers in an ecosystem are a) heterotrophs b) autotrophs c) parasites d) omnivores

In which cycle does the burning of fossil fuels move a material from the lithosphere into the atmosphere? a) nitrogen cycle b) carbon cycle c) water cycle d) phosphorus cycle

In which cycle does the burning of fossil fuels move a material from the lithosphere into the atmosphere? a) nitrogen cycle b) carbon cycle c) water cycle d) phosphorus cycle

An ecosystem is best defined as: a) all the interactions between living things b) the habitat where living things exist c) an area in which living organisms interact with each other and their environment d) a place where organisms reproduce freely producing fertile offspring

An ecosystem is best defined as: a) all the interactions between living things b) the habitat where living things exist c) an area in which living organisms interact with each other and their environment d) a place where organisms reproduce freely producing fertile offspring

There are 555 rabbits in a 100 square kilometer forest There are 555 rabbits in a 100 square kilometer forest. This description is of a rabbit: a) ecosystem b) population c) biodiversity d) community

There are 555 rabbits in a 100 square kilometer forest There are 555 rabbits in a 100 square kilometer forest. This description is of a rabbit: a) ecosystem b) population c) biodiversity d) community

If an animal is eliminated from a food web: a) other animals may be forced to find other food sources b) some animal populations may grow to a very large number c) some animal populations may decrease to a very small number d) all of the above are true e) none of the above are true

If an animal is eliminated from a food web: a) other animals may be forced to find other food sources b) some animal populations may grow to a very large number c) some animal populations may decrease to a very small number d) all of the above are true e) none of the above are true

The following are example of decomposers except: a) mould b) Mushroom c) fungi d) frog

The following are example of decomposers except: a) mould b) Mushroom c) fungi d) frog

A 1____ B 2____ C 3____ D 4____ E 5____ The process that uses oxygen to produce energy. A nutrient cycles 2____ The process that uses sunlight to produce glucose. B bioaccumulation 3____ The rocky abiotic part of the Earth. C photosynthesis 4____ The build up of pollutants as they pass through a food chain. D cellular respiration 5____ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1_D_ B 2____ C 3____ D 4____ E 5____ The process that uses oxygen to produce energy. A nutrient cycles 2____ The process that uses sunlight to produce glucose. B bioaccumulation 3____ The rocky abiotic part of the Earth. C photosynthesis 4____ The build up of pollutants as they pass through a food chain. D cellular respiration 5____ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1_D_ B 2_C_ C 3____ D 4____ E 5____ The process that uses oxygen to produce energy. A nutrient cycles 2_C_ The process that uses sunlight to produce glucose. B bioaccumulation 3____ The rocky abiotic part of the Earth. C photosynthesis 4____ The build up of pollutants as they pass through a food chain. D cellular respiration 5____ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1_D_ B 2_C_ C 3_E_ D 4____ E 5____ The process that uses oxygen to produce energy. A nutrient cycles 2_C_ The process that uses sunlight to produce glucose. B bioaccumulation 3_E_ The rocky abiotic part of the Earth. C photosynthesis 4____ The build up of pollutants as they pass through a food chain. D cellular respiration 5____ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1_D_ B 2_C_ C 3_E_ D 4_B_ E 5____ The process that uses oxygen to produce energy. A nutrient cycles 2_C_ The process that uses sunlight to produce glucose. B bioaccumulation 3_E_ The rocky abiotic part of the Earth. C photosynthesis 4_B_ The build up of pollutants as they pass through a food chain. D cellular respiration 5____ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1_D_ B 2_C_ C 3_E_ D 4_B_ E 5_A_ The process that uses oxygen to produce energy. A nutrient cycles 2_C_ The process that uses sunlight to produce glucose. B bioaccumulation 3_E_ The rocky abiotic part of the Earth. C photosynthesis 4_B_ The build up of pollutants as they pass through a food chain. D cellular respiration 5_A_ The continuous movement of chemicals between the abiotic and biotic parts of the environment. E lithosphere

A 1____ B 2____ C 3____ D 4____ E 5____ The role of green plants in an ecosystem. A trophic level 2____ Which trophic level is made up of carnivores? B food web 3____ The feeding order of an organism within a chain. C secondary consumer 4____ The several food chains linked together. D primary consumer 5____ Which trophic level is made up of herbivores? E producer

A 1_E_ B 2____ C 3____ D 4____ E 5____ The role of green plants in an ecosystem. A trophic level 2____ Which trophic level is made up of carnivores? B food web 3____ The feeding order of an organism within a chain. C secondary consumer 4____ The several food chains linked together. D primary consumer 5____ Which trophic level is made up of herbivores? E producer

A 1_E_ B 2_C_ C 3____ D 4____ E 5____ The role of green plants in an ecosystem. A trophic level 2_C_ Which trophic level is made up of carnivores? B food web 3____ The feeding order of an organism within a chain. C secondary consumer 4____ The several food chains linked together. D primary consumer 5____ Which trophic level is made up of herbivores? E producer

A 1_E_ B 2_C_ C 3_A_ D 4____ E 5____ The role of green plants in an ecosystem. A trophic level 2_C_ Which trophic level is made up of carnivores? B food web 3_A_ The feeding order of an organism within a chain. C secondary consumer 4____ The several food chains linked together. D primary consumer 5____ Which trophic level is made up of herbivores? E producer

A 1_E_ B 2_C_ C 3_A_ D 4_B_ E 5____ The role of green plants in an ecosystem. A trophic level 2_C_ Which trophic level is made up of carnivores? B food web 3_A_ The feeding order of an organism within a chain. C secondary consumer 4_B_ The several food chains linked together. D primary consumer 5____ Which trophic level is made up of herbivores? E producer

A 1_E_ B 2_C_ C 3_A_ D 4_B_ E 5_D_ The role of green plants in an ecosystem. A trophic level 2_C_ Which trophic level is made up of carnivores? B food web 3_A_ The feeding order of an organism within a chain. C secondary consumer 4_B_ The several food chains linked together. D primary consumer 5_D_ Which trophic level is made up of herbivores? E producer

Similarities/Differences

producer/consumer

producer/consumer both use cellular respiration - producer is able to make its own food (photosynthesis) consumers rely on other organisms for food

predator/prey

predator/prey - relationship helps to control both populations - prey is food source for predators - predators at  trophic level vs. prey

density-dependent factor density-independent factor

density-dependent factor density-independent factor - both types of factors limit population size - dependent factors are caused by  in population - independent factors effect population regardless of size

photosynthesis/cellular respiration

photosynthesis/cellular respiration - Photosynthesis only used by producers Cellular respiration used by producers and consumers Both used to recycle carbon

Diagrams Write out three food chains from the above food web.

Diagrams Write out three food chains from the above food web. grass  mouse  snake  hawk

Diagrams Write out three food chains from the above food web. grass  mouse  snake  hawk grass  cricket  frog  hawk

Diagrams Write out three food chains from the above food web. grass  mouse  snake  hawk grass  cricket  frog  hawk grass  mouse  hawk

Explain two things that might alter the carbon cycle.

Explain two things that might alter the carbon cycle. - burning of fossil fuels  atmospheric CO2 - deforestation removes trees that absorb atmospheric CO2 through photosynthesis

Short Answer

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g) (a) Calculate the amount of DDT that 1 mosquito larvae would accumulate in its body tissue in grams using the food chain data stated above. Show your work.

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g = 0.0000001 g) Calculate the amount of DDT that 1 mosquito larvae would accumulate in its body tissue in grams using the food chain data stated above. Show your work. 1 mosquito larvae = 1 unit toxin/algal cell x 2000 algal cells/day = 2000 units of toxin/day (in grams) = 2000 units of toxin/day x 0.0000001g/unit of toxin = 2.0 x 10-4 g or 0.0002 g

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g) (b) Calculate the amount of DDT that 1 minnow would accumulate in its body tissue in grams using the food chain data stated above. Show your work.

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g = 0.0000001 g) (b) Calculate the amount of DDT that 1 minnow would accumulate in its body tissue in grams using the food chain data stated above. Show your work. 1 minnow = 2000 units toxin/mosquito x 1000 mosquitoes/day = 2 000 000 units of toxin/day (in grams) = 2 000 000 units of toxin/day x 0.0000001g/unit of toxin = 0.2 g

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g) (c) Calculate the amount of DDT that 1 kingfisher would accumulate in its body tissue in grams using the food chain data stated above. Show your work.

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g = 0.0000001 g) (c) Calculate the amount of DDT that 1 kingfisher would accumulate in its body tissue in grams using the food chain data stated above. Show your work. 1 kingfisher = 2 000 000 units toxin/minnow x 10 minnows/day = 20 000 000 units of toxin/day (in grams) = 20 000 000 units of toxin/day x 0.0000001g/unit of toxin = 2 g

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g) (d) Kingfishers will die once they have accumulated 40 g of toxin. Calculate how many days it will take until the first kingfishers begin to die.

The following information describes a food chain involving a kingfisher (bird), mosquito larvae, minnows, and algae in a pond ecosystem. 1 mosquito larva consumes 2000 algal cells per day 1 minnow consumes 1000 mosquito larvae per day 1 kingfisher consumes 10 minnows per day   A company sprayed a toxic insecticide (DDT) on farmland to control the insect population. Much of the toxic spray dissolved into a pond ecosystem containing organisms described above. Each algal cell absorbed 1 unit of toxin. (1 unit of toxin = 1.0 x 10-7g) Kingfishers will die once they have accumulated 40 g of toxin. Calculate how many days it will take until the first kingfishers begin to die. time till death = 40 g of DDT 2 g of DDT/day) = 20 days Therefore it will take approximately 20 days until the first of the kingfishers start to die

Based on the documentary “Shark Water”, explain how the finning of sharks is affecting the carbon cycle and contributing to global warming.

Based on the documentary “Shark Water”, explain how the finning of sharks is affecting the carbon cycle and contributing to global warming. Removal of sharks =  in fish populations that eat plankton. Plankton are producers and absorb a larger percentage of the world’s atmospheric CO2. With  plankton, CO2  leading to a greater Green House effect.

Consider the population numbers of two imaginary creatures that live in the forest behind BCI: the pookies and the zupas. year # pookies # zupas 1970 35 20 1972 42 22 1974 55 28 1976 60 38 1978 52 46 1980 37 1982 1984 14 45 1986 30 1988 1990 16 1992 25 1994 50 32 1996 1998 40 2000

Using proper graphing technique, graph the populations of these creatures on the provided paper. Use a different colour for each population (include a legend) and include an appropriate title for your graph.

Using proper graphing technique, graph the populations of these creatures on the provided paper. Use a different colour for each population (include a legend) and include an appropriate title for your graph. Population numbers for Pookies and Zupas # of animals pookies zupas year

Which creature is the predator Which creature is the predator? _________________________ What evidence suggests this?

Which creature is the predator? Zupas What evidence suggests this?

Which creature is the predator? Zupas What evidence suggests this? - their population trend follows that of the pookies

What would you expect to happen to the population of zupas if the population of pookies went down, and why?

What would you expect to happen to the population of zupas if the population of pookies went down, and why? The population of zupas would also decrease because they feed on the pookies.

Other than the predator-prey relationship, describe 2 factors that could account for the change in the population of pookies from 1976 to 1984: 1) 2)

Other than the predator-prey relationship, describe 2 factors that could account for the change in the population of pookies from 1976 to 1984: 1) Drought could cause their food supply to decrease 2)

Other than the predator-prey relationship, describe 2 factors that could account for the change in the population of pookies from 1976 to 1984: 1) Drought could cause their food supply to decrease 2) Disease could have hits the pookies and decreased their numbers.

THE END!