Food Webs & Energy Flow
What do arrows in a food web represent?
a) The direction of water flow
b) The direction of energy flow
c) Who eats the most
d) The strength of organisms
The direction of energy flow
Barnacles on a whale is an example of:
a) Parasitism
b) Mutualism
c) Commensalism
d) Competition
Commensalism
Maximum population size an environment can support is:
a) Growth rate
b) Carrying capacity
c) Limiting factor
d) Food web
Carrying capacity
Main greenhouse gas from fossil fuels:
a) Oxygen
b) Carbon dioxide (CO₂)
c) Methane
d) Nitrogen
Carbon dioxide (CO₂)
Biodiversity measures:
a) Variety of species in an area
b) Total number of individuals
c) Number of predators
d) Energy in food webs
Variety of species in an area
Primary source of energy for almost all ecosystems?
a) Sun
b) Moon
c) Soil
d) Water
A tick feeding on a dog is:
a) Predation
b) Mutualism
c) Parasitism
d) Commensalism
Parasitism
J-shaped growth curve =
a) Logistic growth
b) Exponential growth
c) Stable growth
d) Declining growth
Exponential growt
Cutting down forests reduces which service the most?
a) Pollination
b) Carbon storage
c) Tidal protection
d) Food supply
Carbon storage
Why is biodiversity important?
a) Makes ecosystems weaker
b) Increases stability and resilience
c) Reduces species interactions
d) Decreases energy flow
Increases stability and resilience
What organisms break down dead material and recycle nutrients?
a) Producers
b) Consumers
c) Decomposers
d) Predators
Decomposers
Bees pollinating flowers is:
a) Mutualism
b) Competition
c) Predation
d) Parasitism
Mutualism
Example of density-dependent limiting factor:
a) Hurricane
b) Food
c) Flood
d) Fire
Food
Species introduced without predators are called:
a) Keystone species
b) Invasive species
c) Native species
d) Decomposers
Invasive species
300: Which region has highest biodiversity?
a) Desert
b) Tundra
c) Tropical rainforest
d) Grassland
Tropical rainforest
About what percent of energy is passed between trophic levels?
a) 1%
b) 10%
c) 25%
d) 50%
10%
olves hunting elk is:
a) Competition
b) Predation
c) Mutualism
d) Commensalism
Predation
Example of density-independent limiting factor:
a) Predation
b) Competition
c) Hurricane
d) Food
Hurricane
Overfishing is an example of:
a) Tragedy of the Commons
b) Logistic growth
c) Carrying capacity
d) Succession
Tragedy of the Commons
What is the process by which ecosystems gradually recover after a disturbance (like a fire or flood)?
a) Evolution
b) Secondary succession
c) Extinction
d) Primary productivity
Secondary succession
Why are there fewer top predators than herbivores?
a) Predators don’t need energy
b) Energy decreases at higher levels
c) Predators reproduce more slowly
d) Herbivores hide
b) Energy decreases at higher levels
Two bird species fighting for the same tree cavity is:
a) Competition
b) Mutualism
c) Commensalism
d) Predation
Competition
Loss of one species that affects many others is:
a) Keystone species loss
b) Producer decline
c) Food chain
d) Carrying capacit
Keystone species loss
Greatest cause of species extinction today?
a) Habitat destruction
b) Invasive species
c) Pollution
d) Climate change
Habitat destruction
500: Loss of one species that affects many others is:
a) Keystone species loss
b) Producer decline
c) Food chain
d) Carrying capacity
Keystone species loss