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In an ecosystem where sharks are an apex predator, what could happen if the sharks became extinct?
a) Stingray populations would also deplete.
b) Nothing would happen since sharks are an apex predator.
c) Overpopulation of prey species.
c) Overpopulation of prey species.
A non-living organism is also called...
a) climatic
b) biotic
c) abiotic
c) abiotic
Phytoplankton-->mackerel-->tuna-->shark
In this ecosystem, which is the secondary consumer?
a) phytoplankton b) mackerel
c) tuna d) shark
c) tuna
grass-->grasshopper-->frog-->snake
In this food chain, the grasshopper is a(n):
a) producer b) herbivore
c) carnivore d) decomposer
b) herbivore
Phytoplankton-->mackerel-->tuna-->shark
In this food chain, what do the arrows describe?
a) flow of energy
b) the arrows point to what is being consumed
c) they show the life cycle of phytoplankton
a) flow of energy
Which of the following is an abiotic factor?
a) sea anemone
b) nutrients
c) seaweed
b) nutrients
In an ecosystem, foxes & eagles are carnivores, rabbits & butterflies are herbivores. Which of these shows the flow of energy in this ecosystem?
a) foxes-->rabbits-->eagles
b) plants-->rabbits-->foxes
c) plants-->eagles-->foxes
b) plants-->rabbits-->foxes
Some organisms compete for resources in an ecosystem. Which of the following are competitors?
a) rabbits & coyotes
b) deer & rabbits
c) deer & coyotes
b) deer & rabbits
Which do we obtain from food we eat?
a) light energy to see better
b) energy to carry out photosynthesis
c) matter to build & energy to grow/function
c) matter to build & energy to grow/function
Which of the following is a biotic factor?
a) sea anemone b) water
c) air d) nutrients
a) sea anemone
What do we call a consumer that only eats meat?
a) herbivore b) carnivore
c) omnivore d) primary consumer
b) carnivore
What is the niche (the role) of a decomposer in an ecosystem?
a) They do not help ecosystems.
b) They use the Sun to carry out photosynthesis.
c) They break down dead plants/animals to add nutrients to the soil.
c) They break down dead plants/animals to add nutrients to the soil.
Which statement describes only biotic factors in an ecosystem?
a) an owl & Cardinal live in the same tree
b) fish, snakes, & rocks share a stream
c) seaweed & plankton are carried by currents
a) an owl & Cardinal live in the same tree
Biodiversity in an ecosystem is dependent on which of the following?
a) how many apex predators are in the ecosystem
b) how many decomposers are present in the ecosystem
c) the variety of organisms in an ecosystem
c) the variety of organisms in an ecosystem
In a lake ecosystem, the algae population has decreased. What effect will this have on small fish?
a) The small fish population would increase.
b) The small fish population would stay the same.
c) The small fish population would decrease.
c) The small fish population would decrease.
Primary consumers are considered to be:
a) decomposers b) carnivores
c) herbivores d) omnivores
c) herbivores
grass-->grasshopper-->fish-->hawk
In this food chain, which is the tertiary consumer?
a) grass b) grasshopper
c) fish d) hawk
d) hawk
Light availability in aquatic Ecosystems is dependent on which of the following?
a) salt levels in the water
b) temperature of the water
c) how deep the water is
c) how deep the water is
What could happen in a forest ecosystem is rabbit populations were decreased due to disease?
a) Bobcat populations would increase.
b) Deer populations would decrease due to the same disease since deer eat rabbits.
c) Producer populations would increase due to less herbivores in the ecosystem.
c) Producer populations would increase due to less herbivores in the ecosystem.
Why are producers imperative to an ecosystem?
a) they aren't important to ecosystems
b) they decompose dead matter
c) they collect energy from the Sun
c) they collect energy from the Sun
Producers can carry out which of the following processes?
a) gain energy through cellular respiration
b) use energy from the Sun to produce their own food
c) use energy from consuming other organisms
b) use energy from the Sun to produce their own food
How would we describe horn sharks in this food chain?
a) producer b) primary consumer
c) secondary consumer d) decomposer
c) secondary consumer
In an ecosystem pyramid, what do we call the top trophic level?
a) producers b) primary consumers
c) secondary consumers d) apex predator
d) apex predator
In most food chains, the main source of energy is:
a) the Sun
b) sugar
c) carbon dioxide
d) water
a) the Sun
Why are decomposers essential in an ecosystem?
a) they aren't necessary in ecosystems
b) they decompose dead matter returning nutrients to the soil
c) they use energy from the Sun to return nutrients to the soil
b) they decompose dead matter returning nutrients to the soil