Symbiosis
Labeling trophic levels
Flow of energy
Flow of matter
Analyzing changes to food webs
100
Mutualism
100
Considered the foundation of food chains, webs, and pyramids.
Plants/Producers
100
How much energy is stored in the bodies of consumers?
10%
100
Which organisms have the least amount of energy in the food chain/web/pyramid.
Apex predator
100
Increasing food source would _____________ the predator population. Increasing the predators in a food web would _______________ the prey population.
increase, decrease
200
This occurs when two or more organisms occupy the same niche. This can be between same species or different species.
Competition
200
List all the primary consumers.
Grasshopper and ants
200
What happened to the 90% of the energy not stored in the bodies of organisms?
lost as heat or waste
200
Which organisms have the highest energy in a food chain/web/pyramid.
Producer/plants
200
What would most likely occur if humans caused the death of most of the snake population?
1. decrease in hawk population
2. Increase in mouse population
300
Bees pollinating a flower
Mutualism
300
Define autotrophs
Organisms that make their food
300
Which trophic level has the most energy?
Plants/producers
300
Which population in this food web would contain the greatest amount of energy and biomass?
Corn
300
At which trophic level would a decreased population cause the most damage to a food web?
Producer/plants
400
Example of mutualism between bacteria and humans.
A. Bacteria become resistant to antibacterial medication that humans use for treatment.
B. Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
C. Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.
D. Bacteria in improperly prepared food is consumed by humans causing food poisoning.
B
400
What is missing in the food web?
Decomposers
400
If 10,000 kcal of energy are present in the producer population, approximately how much chemical energy would be present in the population of humpback whales?
100 kcal
400
What might allow a gardener to yield a higher number of tomatoes?
1. Increase in lacewings or lady beetles
2. Increase in spiders
3. Decrease the aphids
400
Which population(s) would increase as a result of a disease that suddenly reduced the Texas horned lizard?
Ants and grasshoppers
500
Describe each of the symbiotic relationships below.
1,2,4 are mutualism.
3 is parastism.
500
Organisms at the 4th level on an energy pyramid are called....
Tertiary consumers
500
If 5,000 kcal of energy is present in the secondary consumer, how much energy is present in the snail population?
50,000 kcal
500
Explain the difference in energy of organisms found at each trophic level.
Organisms at higher trophic levels have LESS energy available to them than organisms at lower trophic levels. 90% of energy is lost at each level.
500
Which of the following might cause an increase in the population of lizards?
1. decrease in hawk population
2. Increase in crickets