Ecosystem & Biodiversity
What is an ecosystem?
A) A group of similar species
B) A community of organisms and interacting with their environment
C) A single organism
D) A food chain
B) A community of organisms and interacting with their environment
What do we call organisms that make their own food?
A) Consumers
B) Predators
C) Decomposers
D) Producers
D) Producers
What happens if a predator is removed?
A) Prey population decreases
B) Prey population increases
C) Ecosystem disappears
D) Producers vanish
B) Prey population increases
What is mutualism?
A) One benefits, one harmed
B) Both benefit
C) One benefits, one unaffected
D) Both harmed
B) Both benefit
What does biodiversity mean?
A) The number of predators in an area
B) Variety of life in an ecosystem
C) Amount of sunlight in an ecosystem
D) Number of abiotic factors
B) Variety of life in an ecosystem
What is a consumer?
A) Makes food from sunlight
B) Breaks down dead matter
C) Eats other organisms
D) Produces oxygen
C) Eats other organisms
How can pollution affect aquatic ecosystems?
A) Increases biodiversity
B) Improves water quality
C) Reduces oxygen levels
D) Creates more producers
C) Reduces oxygen levels
What is parasitism?
A) Both benefit
B) One benefits, one harmed
C) Both harmed
D) Neither affected
B) One benefits, one harmed
Which is a biotic factor?
A) Rocks
B) Water
C) Plants
D) Temperature
C) Plants
What do decomposers do?
A) Eat plants only
B) Break down dead organisms
C) Produce energy from sunlight
D) Hunt prey
B) Break down dead organisms
What is one consequence of overfishing?
A) More fish species
B) Collapse of food chains
C) Increase in predators
D) Cleaner oceans
B) Collapse of food chains
What is commensalism?
A) Both benefit
B) One benefits, one harmed
C) One benefits, one unaffected
D) Both harmed
C) One benefits, one unaffected
Which is an abiotic factor?
A) Trees
B) Sunlight
C) Deer
D) Bacteria
B) Sunlight
Which is a producer and which is a consumer?
A) Grass and rabbit
B) Rabbit and wolf
C) Wolf and mushroom
D) Mushroom and grass
A) Grass and rabbit
How does habitat destruction impact biodiversity?
A) Increases species diversity
B) Reduces species diversity
C) Has no effect
D) Creates new ecosystems
B) Reduces species diversity
Which is an example of competition?
A) Two lions hunting the same prey
B) A bee pollinating a flower
C) A tick on a dog
D) A bird nesting in a tree
A) Two lions hunting the same prey
The top predator in an ecosystem is called:
A) Primary consumer
B) Apex predator
C) Decomposer
D) Producer
B) Apex predator
Why are decomposers essential?
A) They recycle nutrients back into the soil
B) They produce sunlight
C) They create new species
D) They stop predators
A) They recycle nutrients back into the soil
Which human activity most directly causes eutrophication (water nutrient pollution)?
A) Overfishing
B) Fertilizer runoff
C) Air pollution
D) Deforestation
B) Fertilizer runoff
Which is an example of mutualism?
A) A bee and a flower
B) A tick and a dog
C) A shark and a remora
D) Two wolves fighting
A) A bee and a flower