Food Webs & Trophic Levels
What is the trophic level at the bottom of every trophic pyramid?
Producers
What are two words for the type of organism photosynthesizes?
Options: Producer, autotroph, plant
The organisms that feeds on another organism.
Predator
When one organism eats another organism.
Predation.
True or false: Bananas are mildly radioactive.
True
How does energy get into an ecosystem?
Photosynthesis! Sunlight!
What is the MAIN GOAL of photosynthesis?
To turn sunlight into glucose (sugar)
Characteristics that make an organism better suited for its environment.
Adaptations
A relationship in which one organism is unaffected and one organism benefits.
Commensalism.
Which of the following produces MOST of the Earth's oxygen: Forests, the ocean, or soil.
The ocean.
A hawk eats a mouse that eats a bug that eats a leaf. What trophic level is the MOUSE?
THIRD trophic level (SECONDARY consumer)
What is needed for photosynthesis to occur?
Sunlight, CO2, Water
The evolutionary process through which organisms with advantageous traits are more likely to survive and reproduce.
Natural Selection
A mosquito feeds on the blood of a human. What is this symbiotic relationship called?
Parasitism.
Which of the following organisms have no brain: Starfish, worms, or octopus.
Starfish!
What is it called when an organism in an ecosystem has no predators?
Apex predator
What are the outputs of photosynthesis?
Glucose, Oxygen (O2)
What are 2 factors that might impact population growth of a species?
Options: food availability, water, space, predators, natural disaster, adaptations to the environment
Bacteria in our intestines benefit from having a place to live and being fed. Humans benefit from the bacteria because they help us digest food, strengthen our immune system, and more. What is this symbiotic relationship?
Mutualism
True or false: Identical twins have the same fingerprints.
False.
How much energy is LOST between trophic levels?
90%
What part of the plant is responsible for absorbing sunlight?
How would a commensalistic relationship between two species impact the population growth of both species?
There would be no change in population for one organism and an increase in population for the other.
Two male elk fight over territory. What symbiotic relationship is this?
Competition
Water covers ~70% of the globe. What percent is drinkable?
1%